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参考以上lumerical python代码，我想让你帮我写一个代码，仿真一个薄膜铌酸锂波导的截面。...

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問題

光子晶体5.py

参考以上lumerical python代码，我想让你帮我写一个代码，仿真一个薄膜铌酸锂波导的截面。衬底材料选用蓝宝石，TFLN厚度选600nm刻300nm，波导宽度可以通过参数指定，目前可以先指定3um，采用X切Y传Z调制的晶向，波长为4um。请你帮我写一个python代码，使用FDE求解器，仿真上述波导的模式。

思考

Writing script and crafting disclaimers

I have file citations ready for the lumapi path import, citing lines 1-16. I'll ensure the code isn't too lengthy to avoid token limits. Now I'll craft the script, with comments and disclaimers, especially about the mesh step. For isotropic materials, use 'index', while for anisotropic, 'material' is required. I'll define geometry, including the z-span, with appropriate material settings for TFLN_LN and air as the background.

Defining rectangle properties and coordinates

For clarity, I'll use 'y min' and 'y max' for vertical references when defining rectangle properties with 'addrect'. In the MODE script, I’ll set 'x', 'x span', 'y', and 'z span' to define the material dimensions accurately. For example, the substrate extends from y=-sub_thick to y=0. The ridge height is defined by etch depth, extending from y=slab_t to y=t_ln.

Thought for 12m 50s

回答

下面这份脚本会用 MODE(FDE) 求解器搭一个 蓝宝石衬底上的 TFLN（600 nm 厚、刻蚀 300 nm 的 ridge） 截面，并在 λ=4 µm 下求解模式。脚本里沿用了你示例代码那种 sys.path.append(lumerical_path) 的 lumapi 导入方式 (光子晶体5.py)。
材料色散我用 Sellmeier 公式在 4 µm 计算：LiNbO3 的 o/e 折射率 (refractiveindex.info)，蓝宝石（o 光）折射率 (refractiveindex.info)。
FDE 建模/求模用到了 addfde / findmodes / getdata 的官方脚本接口说明 (optics.ansys.com)；材料用 setmaterial(...,"sampled data",...) 的 4 列（频率+εx,εy,εz）方式做对角各向异性 (optics.ansys.com)。

晶向映射（X切 Y传 Z调制）在这个 2D Z-normal FDE 里这样对应：

  • 仿真 y（竖直/厚度方向）← 晶体 X（X-cut，法向）
  • 仿真 z（传播方向）← 晶体 Y（Y-prop）
  • 仿真 x（横向/波导宽度方向）← 晶体 Z（Z-mod 方向）
    因此对 LiNbO3（光轴在晶体 Z）来说，在仿真坐标里相当于 光轴沿 x，即 εx=εe, εy=εo, εz=εo。
python
import sys
import numpy as np

# ============================================================
# 1) 配置 Lumerical Python API 路径（按你电脑实际安装路径改）
#    这里写法参考你给的示例脚本风格
# ============================================================
lumerical_path = r"C:\Program Files\ANSYS Inc\v241\Lumerical\api\python"
if lumerical_path not in sys.path:
    sys.path.append(lumerical_path)

try:
    import lumapi
except ImportError as e:
    raise ImportError(f"无法导入 lumapi，请检查路径: {lumerical_path}") from e


# ============================================================
# 2) Sellmeier（来自 refractiveindex.info：Zelmon 1997 / Malitson&Dodge 等）
#    返回折射率 n(λ)，λ 单位：um
# ============================================================
def n_LN_o_zelmon(lam_um: float) -> float:
    lam2 = lam_um**2
    n2 = 1 + 2.6734*lam2/(lam2-0.01764) + 1.2290*lam2/(lam2-0.05914) + 12.614*lam2/(lam2-474.60)
    return float(np.sqrt(n2))

def n_LN_e_zelmon(lam_um: float) -> float:
    lam2 = lam_um**2
    n2 = 1 + 2.9804*lam2/(lam2-0.02047) + 0.5981*lam2/(lam2-0.0666) + 8.9543*lam2/(lam2-416.08)
    return float(np.sqrt(n2))

def n_sapphire_o_malitson(lam_um: float) -> float:
    lam2 = lam_um**2
    c1 = 0.0726631**2
    c2 = 0.1193242**2
    c3 = 18.028251**2
    n2 = 1 + 1.4313493*lam2/(lam2-c1) + 0.65054713*lam2/(lam2-c2) + 5.3414021*lam2/(lam2-c3)
    return float(np.sqrt(n2))


# ============================================================
# 3) 建立材料（各向异性 LN 用 sampled data: [f, epsx, epsy, epsz]）
# ============================================================
def safe_deletematerial(mode, name: str):
    try:
        mode.deletematerial(name)
    except Exception:
        pass

def build_materials(mode, lambda0_m: float):
    c0 = 299792458.0
    lam_um = lambda0_m * 1e6

    n_o = n_LN_o_zelmon(lam_um)
    n_e = n_LN_e_zelmon(lam_um)
    n_sap = n_sapphire_o_malitson(lam_um)

    # 频率点（给两三个点，避免只给 1 行数据导致拟合/插值异常）
    f0 = c0 / lambda0_m
    freqs = np.array([0.95*f0, f0, 1.05*f0])

    # X切Y传Z调制：仿真坐标里 optic axis 沿 x
    # => epsx = n_e^2, epsy = n_o^2, epsz = n_o^2
    epsx = n_e**2
    epsy = n_o**2
    epsz = n_o**2
    ln_sampled = np.column_stack([freqs, epsx*np.ones_like(freqs), epsy*np.ones_like(freqs), epsz*np.ones_like(freqs)])

    # 清理旧材料（如果存在）
    safe_deletematerial(mode, "TFLN_LN_Xcut_Yprop")
    safe_deletematerial(mode, "SAPPHIRE_iso")

    # --- 各向异性 LN：Sampled data（4 列：f, epsx, epsy, epsz）---
    mode.addmaterial("Sampled data")
    mode.setmaterial("Sampled data", "name", "TFLN_LN_Xcut_Yprop")
    # 有些版本不需要/不支持显式设置 Anisotropy，失败就跳过
    try:
        mode.setmaterial("TFLN_LN_Xcut_Yprop", "Anisotropy", 1)  # 1=Diagonal（若该属性存在）
    except Exception:
        pass
    mode.setmaterial("TFLN_LN_Xcut_Yprop", "sampled data", ln_sampled)
    try:
        mode.setmaterial("TFLN_LN_Xcut_Yprop", "max coefficients", 2)
    except Exception:
        pass

    # --- 蓝宝石：简单当作各向同性 (n,k) 材料（k=0）---
    mode.addmaterial("(n,k) Material")
    mode.setmaterial("(n,k) Material", "name", "SAPPHIRE_iso")
    mode.setmaterial("SAPPHIRE_iso", "Refractive Index", float(n_sap))
    mode.setmaterial("SAPPHIRE_iso", "Imaginary Refractive Index", 0.0)

    return {"n_o": n_o, "n_e": n_e, "n_sap": n_sap}


# ============================================================
# 4) 几何 & FDE 求模
# ============================================================
def simulate_tfln_ridge_fde(
    wg_width_um: float = 3.0,
    lambda_um: float = 4.0,
    tfln_thickness_nm: float = 600.0,
    etch_depth_nm: float = 300.0,
):
    # ---- 参数换算到 SI ----
    lambda0 = lambda_um * 1e-6
    w_wg = wg_width_um * 1e-6
    t_ln = tfln_thickness_nm * 1e-9
    etch = etch_depth_nm * 1e-9
    slab_t = t_ln - etch  # 刻蚀后剩余 slab 厚度

    # 仿真窗口（可按需要调大/调小）
    x_span = max(12e-6, 4*w_wg)
    sub_thick = 4e-6
    clad_thick = 4e-6
    y_min = -sub_thick
    y_max = t_ln + clad_thick
    y_span = y_max - y_min
    y_center = 0.5*(y_min + y_max)

    # ---- 启动 MODE ----
    mode = lumapi.MODE(hide=False)
    mode.deleteall()

    mats = build_materials(mode, lambda0)
    print(f"[Info] λ={lambda_um:.3f} um:  LN no={mats['n_o']:.4f}, ne={mats['n_e']:.4f};  sapphire n={mats['n_sap']:.4f}")

    # ---- 基底：蓝宝石（y in [-sub_thick, 0]）----
    mode.addrect()
    mode.set("name", "substrate_sapphire")
    mode.set("material", "SAPPHIRE_iso")
    mode.set("x", 0.0)
    mode.set("x span", x_span)
    mode.set("y", -0.5*sub_thick)
    mode.set("y span", sub_thick)
    mode.set("z", 0.0)
    mode.set("z span", 1e-6)

    # ---- LN slab：厚 slab_t，铺满横向 ----
    mode.addrect()
    mode.set("name", "ln_slab")
    mode.set("material", "TFLN_LN_Xcut_Yprop")
    mode.set("x", 0.0)
    mode.set("x span", x_span)
    mode.set("y", 0.5*slab_t)
    mode.set("y span", slab_t)
    mode.set("z", 0.0)
    mode.set("z span", 1e-6)

    # ---- LN ridge：在 slab 上再加 etch 高度，宽度 w_wg ----
    mode.addrect()
    mode.set("name", "ln_ridge")
    mode.set("material", "TFLN_LN_Xcut_Yprop")
    mode.set("x", 0.0)
    mode.set("x span", w_wg)
    mode.set("y", slab_t + 0.5*etch)
    mode.set("y span", etch)
    mode.set("z", 0.0)
    mode.set("z span", 1e-6)

    # ---- FDE region（XY 截面，传播沿 z）----
    mode.addfde()
    mode.set("name", "FDE")
    mode.set("solver type", 3)   # 2D Z normal（XY 平面） 见 addfde 示例
    mode.set("x", 0.0)
    mode.set("x span", x_span)
    mode.set("y", y_center)
    mode.set("y span", y_span)
    mode.set("z", 0.0)

    # 开边界
    mode.set("x min bc", "PML")
    mode.set("x max bc", "PML")
    mode.set("y min bc", "PML")
    mode.set("y max bc", "PML")

    # 网格（全局较粗 + LN 附近加密）
    mode.set("define x mesh by", "maximum mesh step")
    mode.set("dx", 120e-9)
    mode.set("define y mesh by", "maximum mesh step")
    mode.set("dy", 60e-9)

    mode.addmesh()
    mode.set("name", "mesh_ln")
    mode.set("x", 0.0)
    mode.set("x span", max(6e-6, 2*w_wg))
    mode.set("y", 0.5*t_ln)
    mode.set("y span", t_ln + 0.8e-6)
    mode.set("dx", 30e-9)
    mode.set("dy", 20e-9)

    # ---- 求模设置 ----
    mode.select("FDE")
    mode.setanalysis("wavelength", lambda0)
    mode.setanalysis("number of trial modes", 8)
    # 如果你更关心 TE-like/TM-like，可加：
    # mode.setanalysis("use max index", 1)
    # mode.setanalysis("n", mats["n_o"])  # 搜索初值（可选）

    # ---- 求解 ----
    n_found = mode.findmodes()
    print(f"[Result] 找到模式数: {int(n_found)}")

    # 打印前几个模式的 neff / TE fraction
    n_report = min(int(n_found), 6)
    for i in range(1, n_report + 1):
        obj = f"FDE::data::mode{i}"
        neff = mode.getdata(obj, "neff")
        try:
            tefrac = mode.getdata(obj, "TE polarization fraction")
            tefrac_val = float(np.array(tefrac).squeeze())
        except Exception:
            tefrac_val = float("nan")

        neff_val = float(np.array(neff).squeeze())
        print(f"  mode{i}: neff = {neff_val:.6f},  TE_frac = {tefrac_val:.4f}")

    # 可选：保存工程
    # mode.save("tfln_ridge_on_sapphire_4um.lms")

    return mode


if __name__ == "__main__":
    simulate_tfln_ridge_fde(wg_width_um=3.0, lambda_um=4.0, tfln_thickness_nm=600.0, etch_depth_nm=300.0)

如果你希望我把 上包层改成 SiO2/空气封装、或者要按 “X切但传播方向换成 Z / Y切”等自动旋转晶轴（而不是我这里用“光轴沿 x”的等效映射），我也可以把脚本扩展成“晶向参数化 + 自动生成 ε 张量”。

問題

(base) PS C:\Users\47004\Desktop\TFLN_Sim> & "C:/Program Files/ANSYS Inc/v251/Lumerical/python-3.9.9-embed-amd64/python.exe" c:/Users/47004/Desktop/TFLN_Sim/TFLN_Sapphire_600thi.py
Traceback (most recent call last):
File "c:\Users\47004\Desktop\TFLN_Sim\TFLN_Sapphire_600thi.py", line 225, in <module>
simulate_tfln_ridge_fde(wg_width_um=3.0, lambda_um=4.0, tfln_thickness_nm=600.0, etch_depth_nm=300.0)
File "c:\Users\47004\Desktop\TFLN_Sim\TFLN_Sapphire_600thi.py", line 125, in simulate_tfln_ridge_fde
mats = build_materials(mode, lambda0)
File "c:\Users\47004\Desktop\TFLN_Sim\TFLN_Sapphire_600thi.py", line 75, in build_materials
mode.setmaterial("Sampled data", "name", "TFLN_LN_Xcut_Yprop")
File "C:\Program Files\ANSYS Inc\v251\Lumerical\api\python\lumapi.py", line 1257, in <lambda>
method = (lambda x: lambda self, *args: appCall(self, x, args))(name)
File "C:\Program Files\ANSYS Inc\v251\Lumerical\api\python\lumapi.py", line 899, in appCall
raise LumApiError(message)
lumapi.LumApiError: "The material 'Sampled data' cannot be found."

思考

Fixing addmaterial usage and updates

I don’t need to click for the snippet since I already have it with line numbers. I’ll respond by showing the fixed addmaterial call and a minimal code diff, explaining that addmaterial now returns the actual material name. I'll also suggest debugging with mode.eval("?addmaterial;") to list materials. I'll remind the user to use the correct API and note the version update from v241 to v251.

Providing code fix and citation details

When working with the 4 um value, it seems fine, but I’ll keep the reference intact. I'll cite the sys.path logic and include citations from official documentation for addmaterial and setmaterial. A snippet will be provided for the code changes, explaining that addmaterial returns a name string. I'll also mention clarifications about material types and recommend safer use of "Dielectric" or "Refractive Index."

Clarifying material creation approach

For "Dielectric", it's simpler to set the "index" property directly in the geometry rather than using addmaterial. For sapphire, just setting "index" to n_sap should work. However, keeping the material name may ensure consistency. For LN anisotropy, the material must be created, as setting just "index" won't work here.

Updating anisotropic material code

For anisotropic "Sampled data" materials, ensure to set "Anisotropy" to 1 in MODE as specified in the docs. Avoid mismatch by using the correct property name for "Sampled data". If needed, update the numpy array to np.complex128. Don’t forget to update to the latest version of Lumerical. The main issue here is renaming the wrong material.

Thought for 1m 27s

回答

这个报错的原因很简单：addmaterial() 并不会创建一个名字叫 "Sampled data" 的材料；它会返回新建材料的实际名字（通常是 material1 之类）。你现在是：

python
mode.addmaterial("Sampled data")
mode.setmaterial("Sampled data","name","TFLN_LN_Xcut_Yprop")  # ❌ 这里找不到 "Sampled data"

所以会报 cannot be found。官方脚本用法也是：temp = addmaterial("Sampled data"); setmaterial(temp,"name",...) (optics.ansys.com)

你参考的示例代码里也是先把 lumapi 路径加到 sys.path 再 import（你跑得通说明这部分没问题）(光子晶体5.py)

✅ 直接可用的修正版（只改 build_materials 里材料创建部分）

把你脚本里 build_materials() 里创建材料那段替换成下面这样（关键是 接住 addmaterial 的返回值）：

python
def build_materials(mode, lambda0_m: float):
    c0 = 299792458.0
    lam_um = lambda0_m * 1e6

    n_o = n_LN_o_zelmon(lam_um)
    n_e = n_LN_e_zelmon(lam_um)
    n_sap = n_sapphire_o_malitson(lam_um)

    f0 = c0 / lambda0_m
    freqs = np.array([0.95*f0, f0, 1.05*f0])

    # X切Y传Z调制 => optic axis 沿仿真 x
    epsx = (n_e**2) + 0j
    epsy = (n_o**2) + 0j
    epsz = (n_o**2) + 0j
    ln_sampled = np.column_stack([
        freqs,
        epsx*np.ones_like(freqs),
        epsy*np.ones_like(freqs),
        epsz*np.ones_like(freqs),
    ])

    # 删除旧材料（如果存在）
    for name in ["TFLN_LN_Xcut_Yprop"]:
        try:
            mode.deletematerial(name)
        except Exception:
            pass

    # ✅ 正确：接住 addmaterial 的返回名
    temp = mode.addmaterial("Sampled data")
    mode.setmaterial(temp, "name", "TFLN_LN_Xcut_Yprop")
    try:
        mode.setmaterial("TFLN_LN_Xcut_Yprop", "Anisotropy", 1)  # diagonal
    except Exception:
        pass
    mode.setmaterial("TFLN_LN_Xcut_Yprop", "sampled data", ln_sampled)
    try:
        mode.setmaterial("TFLN_LN_Xcut_Yprop", "max coefficients", 2)
    except Exception:
        pass

    # —— 蓝宝石建议别折腾建材，直接用 object defined dielectric（更稳）——
    # 你后面建 substrate 的地方，把 material 设成 "<Object defined dielectric>"，
    # 再 set("index", n_sap) 即可，不需要 addmaterial

    return {"n_o": n_o, "n_e": n_e, "n_sap": n_sap}

然后把你建蓝宝石衬底那块改成下面这种（避免不同版本里 "(n,k) Material" 名字不一致导致新坑）：

python
mode.addrect()
mode.set("name", "substrate_sapphire")
mode.set("material", "<Object defined dielectric>")
mode.set("index", mats["n_sap"])
# 其余 x/y 尺寸照旧

（可选）一行调试：看看你版本到底有哪些可 add 的材料模型

如果你还想确认 "Sampled data" 这个字符串在你 v251 里是否存在，可以临时加一句：

python
print(mode.eval("?addmaterial;"))

它会列出当前版本支持的 material model 名称（官方也这么建议查）(optics.ansys.com)

如果你把这两处改完后还有报错（比如 setanalysis("wavelength", ...) 或 findmodes() 的对象路径在你版本里不同），把新的报错贴出来，我再按 v251 的接口把**求模结果提取（neff / TE fraction / 模场图导出）**那部分也给你做成完全兼容版本。

問題

请给我完整的可以直接运行的代码

問題

import sys
import numpy as np

============================================================

1) 配置 Lumerical Python API 路径（按你电脑实际安装路径改）

这里写法参考你给的示例脚本风格

============================================================

lumerical_path = r"C:\Program Files\ANSYS Inc\v241\Lumerical\api\python"
if lumerical_path not in sys.path:
sys.path.append(lumerical_path)

try:
import lumapi
except ImportError as e:
raise ImportError(f"无法导入 lumapi，请检查路径: {lumerical_path}") from e

============================================================

2) Sellmeier（来自 refractiveindex.info：Zelmon 1997 / Malitson&Dodge 等）

返回折射率 n(λ)，λ 单位：um

============================================================

def n_LN_o_zelmon(lam_um: float) -> float:
lam2 = lam_um**2
n2 = 1 + 2.6734lam2/(lam2-0.01764) + 1.2290lam2/(lam2-0.05914) + 12.614*lam2/(lam2-474.60)
return float(np.sqrt(n2))

def n_LN_e_zelmon(lam_um: float) -> float:
lam2 = lam_um**2
n2 = 1 + 2.9804lam2/(lam2-0.02047) + 0.5981lam2/(lam2-0.0666) + 8.9543*lam2/(lam2-416.08)
return float(np.sqrt(n2))

def n_sapphire_o_malitson(lam_um: float) -> float:
lam2 = lam_um2
c1 = 0.07266312
c2 = 0.11932422
c3 = 18.0282512
n2 = 1 + 1.4313493lam2/(lam2-c1) + 0.65054713lam2/(lam2-c2) + 5.3414021*lam2/(lam2-c3)
return float(np.sqrt(n2))

def build_materials(mode, lambda0_m: float):
c0 = 299792458.0
lam_um = lambda0_m * 1e6

text
n_o = n_LN_o_zelmon(lam_um)
n_e = n_LN_e_zelmon(lam_um)
n_sap = n_sapphire_o_malitson(lam_um)

f0 = c0 / lambda0_m
freqs = np.array([0.95*f0, f0, 1.05*f0])

# X切Y传Z调制 => optic axis 沿仿真 x
epsx = (n_e**2) + 0j
epsy = (n_o**2) + 0j
epsz = (n_o**2) + 0j
ln_sampled = np.column_stack([
    freqs,
    epsx*np.ones_like(freqs),
    epsy*np.ones_like(freqs),
    epsz*np.ones_like(freqs),
])

# 删除旧材料（如果存在）
for name in ["TFLN_LN_Xcut_Yprop"]:
    try:
        mode.deletematerial(name)
    except Exception:
        pass

# ✅ 正确：接住 addmaterial 的返回名
temp = mode.addmaterial("Sampled data")
mode.setmaterial(temp, "name", "TFLN_LN_Xcut_Yprop")
try:
    mode.setmaterial("TFLN_LN_Xcut_Yprop", "Anisotropy", 1)  # diagonal
except Exception:
    pass
mode.setmaterial("TFLN_LN_Xcut_Yprop", "sampled data", ln_sampled)
try:
    mode.setmaterial("TFLN_LN_Xcut_Yprop", "max coefficients", 2)
except Exception:
    pass

# —— 蓝宝石建议别折腾建材，直接用 object defined dielectric（更稳）——
# 你后面建 substrate 的地方，把 material 设成 "<Object defined dielectric>"，
# 再 set("index", n_sap) 即可，不需要 addmaterial

return {"n_o": n_o, "n_e": n_e, "n_sap": n_sap}

============================================================

4) 几何 & FDE 求模

============================================================

def simulate_tfln_ridge_fde(
wg_width_um: float = 3.0,
lambda_um: float = 4.0,
tfln_thickness_nm: float = 600.0,
etch_depth_nm: float = 300.0,
):
# ---- 参数换算到 SI ----
lambda0 = lambda_um * 1e-6
w_wg = wg_width_um * 1e-6
t_ln = tfln_thickness_nm * 1e-9
etch = etch_depth_nm * 1e-9
slab_t = t_ln - etch # 刻蚀后剩余 slab 厚度

text
# 仿真窗口（可按需要调大/调小）
x_span = max(12e-6, 4*w_wg)
sub_thick = 4e-6
clad_thick = 4e-6
y_min = -sub_thick
y_max = t_ln + clad_thick
y_span = y_max - y_min
y_center = 0.5*(y_min + y_max)

# ---- 启动 MODE ----
mode = lumapi.MODE(hide=False)
mode.deleteall()

mats = build_materials(mode, lambda0)
print(f"[Info] λ={lambda_um:.3f} um:  LN no={mats['n_o']:.4f}, ne={mats['n_e']:.4f};  sapphire n={mats['n_sap']:.4f}")

# ---- 基底：蓝宝石（y in [-sub_thick, 0]）----
mode.addrect()
mode.set("name", "substrate_sapphire")
mode.set("material", "<Object defined dielectric>")
mode.set("index", mats["n_sap"])

其余 x/y 尺寸照旧

text
mode.set("x", 0.0)
mode.set("x span", x_span)
mode.set("y", -0.5*sub_thick)
mode.set("y span", sub_thick)
mode.set("z", 0.0)
mode.set("z span", 1e-6)

# ---- LN slab：厚 slab_t，铺满横向 ----
mode.addrect()
mode.set("name", "ln_slab")
mode.set("material", "TFLN_LN_Xcut_Yprop")
mode.set("x", 0.0)
mode.set("x span", x_span)
mode.set("y", 0.5*slab_t)
mode.set("y span", slab_t)
mode.set("z", 0.0)
mode.set("z span", 1e-6)

# ---- LN ridge：在 slab 上再加 etch 高度，宽度 w_wg ----
mode.addrect()
mode.set("name", "ln_ridge")
mode.set("material", "TFLN_LN_Xcut_Yprop")
mode.set("x", 0.0)
mode.set("x span", w_wg)
mode.set("y", slab_t + 0.5*etch)
mode.set("y span", etch)
mode.set("z", 0.0)
mode.set("z span", 1e-6)

# ---- FDE region（XY 截面，传播沿 z）----
mode.addfde()
mode.set("name", "FDE")
mode.set("solver type", 3)   # 2D Z normal（XY 平面） 见 addfde 示例
mode.set("x", 0.0)
mode.set("x span", x_span)
mode.set("y", y_center)
mode.set("y span", y_span)
mode.set("z", 0.0)

# 开边界
mode.set("x min bc", "PML")
mode.set("x max bc", "PML")
mode.set("y min bc", "PML")
mode.set("y max bc", "PML")

# 网格（全局较粗 + LN 附近加密）
mode.set("define x mesh by", "maximum mesh step")
mode.set("dx", 120e-9)
mode.set("define y mesh by", "maximum mesh step")
mode.set("dy", 60e-9)

mode.addmesh()
mode.set("name", "mesh_ln")
mode.set("x", 0.0)
mode.set("x span", max(6e-6, 2*w_wg))
mode.set("y", 0.5*t_ln)
mode.set("y span", t_ln + 0.8e-6)
mode.set("dx", 30e-9)
mode.set("dy", 20e-9)

# ---- 求模设置 ----
mode.select("FDE")
mode.setanalysis("wavelength", lambda0)
mode.setanalysis("number of trial modes", 8)
# 如果你更关心 TE-like/TM-like，可加：
# mode.setanalysis("use max index", 1)
# mode.setanalysis("n", mats["n_o"])  # 搜索初值（可选）

# ---- 求解 ----
n_found = mode.findmodes()
print(f"[Result] 找到模式数: {int(n_found)}")

# 打印前几个模式的 neff / TE fraction
n_report = min(int(n_found), 6)
for i in range(1, n_report + 1):
    obj = f"FDE::data::mode{i}"
    neff = mode.getdata(obj, "neff")
    try:
        tefrac = mode.getdata(obj, "TE polarization fraction")
        tefrac_val = float(np.array(tefrac).squeeze())
    except Exception:
        tefrac_val = float("nan")

    neff_val = float(np.array(neff).squeeze())
    print(f"  mode{i}: neff = {neff_val:.6f},  TE_frac = {tefrac_val:.4f}")

# 可选：保存工程
# mode.save("tfln_ridge_on_sapphire_4um.lms")

return mode

if name == "main":
simulate_tfln_ridge_fde(wg_width_um=3.0, lambda_um=4.0, tfln_thickness_nm=600.0, etch_depth_nm=300.0)

运行上面的代码报了以下的错误。请你给我完整的修改后可直接运行的代码
(base) PS C:\Users\47004\Desktop\TFLN_Sim> & "C:/Program Files/ANSYS Inc/v251/Lumerical/python-3.9.9-embed-amd64/python.exe" c:/Users/47004/Desktop/TFLN_Sim/TFLN_Sapphire_600thi.py
[Info] λ=4.000 um: LN no=2.1142, ne=2.0559; sapphire n=1.6752
Traceback (most recent call last):
File "c:\Users\47004\Desktop\TFLN_Sim\TFLN_Sapphire_600thi.py", line 218, in <module>
simulate_tfln_ridge_fde(wg_width_um=3.0, lambda_um=4.0, tfln_thickness_nm=600.0, etch_depth_nm=300.0)
File "c:\Users\47004\Desktop\TFLN_Sim\TFLN_Sapphire_600thi.py", line 156, in simulate_tfln_ridge_fde
mode.set("name", "FDE")
File "C:\Program Files\ANSYS Inc\v251\Lumerical\api\python\lumapi.py", line 1257, in <lambda>
method = (lambda x: lambda self, *args: appCall(self, x, args))(name)
File "C:\Program Files\ANSYS Inc\v251\Lumerical\api\python\lumapi.py", line 899, in appCall
raise LumApiError(message)
lumapi.LumApiError: "in set, the requested property 'name' is inactive"

問題

import sys
import numpy as np

============================================================

1) 配置 Lumerical Python API 路径（按你电脑实际安装路径改）

这里写法参考你给的示例脚本风格

============================================================

lumerical_path = r"C:\Program Files\ANSYS Inc\v251\Lumerical\api\python"
if lumerical_path not in sys.path:
sys.path.append(lumerical_path)

try:
import lumapi
except ImportError as e:
raise ImportError(f"无法导入 lumapi，请检查路径: {lumerical_path}") from e

============================================================

2) Sellmeier（来自 refractiveindex.info：Zelmon 1997 / Malitson&Dodge 等）

返回折射率 n(λ)，λ 单位：um

============================================================

def n_LN_o_zelmon(lam_um: float) -> float:
lam2 = lam_um**2
n2 = 1 + 2.6734lam2/(lam2-0.01764) + 1.2290lam2/(lam2-0.05914) + 12.614*lam2/(lam2-474.60)
return float(np.sqrt(n2))

def n_LN_e_zelmon(lam_um: float) -> float:
lam2 = lam_um**2
n2 = 1 + 2.9804lam2/(lam2-0.02047) + 0.5981lam2/(lam2-0.0666) + 8.9543*lam2/(lam2-416.08)
return float(np.sqrt(n2))

def n_sapphire_o_malitson(lam_um: float) -> float:
lam2 = lam_um2
c1 = 0.07266312
c2 = 0.11932422
c3 = 18.0282512
n2 = 1 + 1.4313493lam2/(lam2-c1) + 0.65054713lam2/(lam2-c2) + 5.3414021*lam2/(lam2-c3)
return float(np.sqrt(n2))

def build_materials(mode, lambda0_m: float):
c0 = 299792458.0
lam_um = lambda0_m * 1e6

text
n_o = n_LN_o_zelmon(lam_um)
n_e = n_LN_e_zelmon(lam_um)
n_sap = n_sapphire_o_malitson(lam_um)

f0 = c0 / lambda0_m
freqs = np.array([0.95*f0, f0, 1.05*f0])

# X切Y传Z调制 => optic axis 沿仿真 x
epsx = (n_e**2) + 0j
epsy = (n_o**2) + 0j
epsz = (n_o**2) + 0j
ln_sampled = np.column_stack([
    freqs,
    epsx*np.ones_like(freqs),
    epsy*np.ones_like(freqs),
    epsz*np.ones_like(freqs),
])

# 删除旧材料（如果存在）
for name in ["TFLN_LN_Xcut_Yprop"]:
    try:
        mode.deletematerial(name)
    except Exception:
        pass

# ✅ 正确：接住 addmaterial 的返回名
temp = mode.addmaterial("Sampled data")
mode.setmaterial(temp, "name", "TFLN_LN_Xcut_Yprop")
try:
    mode.setmaterial("TFLN_LN_Xcut_Yprop", "Anisotropy", 1)  # diagonal
except Exception:
    pass
mode.setmaterial("TFLN_LN_Xcut_Yprop", "sampled data", ln_sampled)
try:
    mode.setmaterial("TFLN_LN_Xcut_Yprop", "max coefficients", 2)
except Exception:
    pass

return {"n_o": n_o, "n_e": n_e, "n_sap": n_sap}

============================================================

4) 几何 & FDE 求模

============================================================

def simulate_tfln_ridge_fde(
wg_width_um: float = 3.0,
lambda_um: float = 4.0,
tfln_thickness_nm: float = 600.0,
etch_depth_nm: float = 300.0,
):
# ---- 参数换算到 SI ----
lambda0 = lambda_um * 1e-6
w_wg = wg_width_um * 1e-6
t_ln = tfln_thickness_nm * 1e-9
etch = etch_depth_nm * 1e-9
slab_t = t_ln - etch # 刻蚀后剩余 slab 厚度

text
# 仿真窗口（可按需要调大/调小）
x_span = max(12e-6, 4*w_wg)
sub_thick = 4e-6
clad_thick = 4e-6
y_min = -sub_thick
y_max = t_ln + clad_thick
y_span = y_max - y_min
y_center = 0.5*(y_min + y_max)

# ---- 启动 MODE ----
mode = lumapi.MODE(hide=False)
mode.deleteall()

mats = build_materials(mode, lambda0)
print(f"[Info] λ={lambda_um:.3f} um:  LN no={mats['n_o']:.4f}, ne={mats['n_e']:.4f};  sapphire n={mats['n_sap']:.4f}")

# ---- 基底：蓝宝石（y in [-sub_thick, 0]）----
mode.addrect()
mode.set("name", "substrate_sapphire")
mode.set("material", "<Object defined dielectric>")
mode.set("index", mats["n_sap"])
mode.set("x", 0.0)
mode.set("x span", x_span)
mode.set("y", -0.5*sub_thick)
mode.set("y span", sub_thick)
mode.set("z", 0.0)
mode.set("z span", 1e-6)

# ---- LN slab：厚 slab_t，铺满横向 ----
mode.addrect()
mode.set("name", "ln_slab")
mode.set("material", "TFLN_LN_Xcut_Yprop")
mode.set("x", 0.0)
mode.set("x span", x_span)
mode.set("y", 0.5*slab_t)
mode.set("y span", slab_t)
mode.set("z", 0.0)
mode.set("z span", 1e-6)

# ---- LN ridge：在 slab 上再加 etch 高度，宽度 w_wg ----
mode.addrect()
mode.set("name", "ln_ridge")
mode.set("material", "TFLN_LN_Xcut_Yprop")
mode.set("x", 0.0)
mode.set("x span", w_wg)
mode.set("y", slab_t + 0.5*etch)
mode.set("y span", etch)
mode.set("z", 0.0)
mode.set("z span", 1e-6)

# ---- FDE region（XY 截面，传播沿 z）----
mode.addfde()
mode.set("solver type", 3)   # 2D Z normal（XY 平面）
mode.set("x", 0.0)
mode.set("x span", x_span)
mode.set("y", y_center)
mode.set("y span", y_span)
mode.set("z", 0.0)

# 开边界
mode.set("x min bc", "PML")
mode.set("x max bc", "PML")
mode.set("y min bc", "PML")
mode.set("y max bc", "PML")

# 网格（全局较粗 + LN 附近加密）
mode.set("define x mesh by", "maximum mesh step")
mode.set("dx", 120e-9)
mode.set("define y mesh by", "maximum mesh step")
mode.set("dy", 60e-9)

mode.addmesh()
mode.set("name", "mesh_ln")
mode.set("x", 0.0)
mode.set("x span", max(6e-6, 2*w_wg))
mode.set("y", 0.5*t_ln)
mode.set("y span", t_ln + 0.8e-6)
mode.set("dx", 30e-9)
mode.set("dy", 20e-9)

# ---- 求模设置 ----
mode.select("FDE")
mode.setanalysis("wavelength", lambda0)
mode.setanalysis("number of trial modes", 8)

# ---- 求解 ----
n_found = mode.findmodes()
print(f"[Result] 找到模式数: {int(n_found)}")

# 打印前几个模式的 neff / TE fraction
n_report = min(int(n_found), 6)
for i in range(1, n_report + 1):
    obj = f"FDE::data::mode{i}"
    neff = mode.getdata(obj, "neff")
    try:
        tefrac = mode.getdata(obj, "TE polarization fraction")
        tefrac_val = float(np.array(tefrac).squeeze())
    except Exception:
        tefrac_val = float("nan")

    neff_val = float(np.array(neff).squeeze())
    print(f"  mode{i}: neff = {neff_val:.6f},  TE_frac = {tefrac_val:.4f}")

# 可选：保存工程
# mode.save("tfln_ridge_on_sapphire_4um.lms")

return mode

if name == "main":
simulate_tfln_ridge_fde(wg_width_um=3.0, lambda_um=4.0, tfln_thickness_nm=600.0, etch_depth_nm=300.0)

上面这个代码报错：base) PS C:\Users\47004\Desktop\TFLN_Sim> & "C:/Program Files/ANSYS Inc/v251/Lumerical/python-3.9.9-embed-amd64/python.exe" c:/Users/47004/Desktop/TFLN_Sim/TFLN_Sapphire_600thi.py
[Info] λ=4.000 um: LN no=2.1142, ne=2.0559; sapphire n=1.6752
[Result] 找到模式数: 5
Traceback (most recent call last):
File "c:\Users\47004\Desktop\TFLN_Sim\TFLN_Sapphire_600thi.py", line 212, in <module>
simulate_tfln_ridge_fde(wg_width_um=3.0, lambda_um=4.0, tfln_thickness_nm=600.0, etch_depth_nm=300.0)
File "c:\Users\47004\Desktop\TFLN_Sim\TFLN_Sapphire_600thi.py", line 202, in simulate_tfln_ridge_fde
neff_val = float(np.array(neff).squeeze())
TypeError: can't convert complex to float

思考

Providing full code fix and guidance

This looks like a complex coding issue involving complex numbers, path detection, and wavelength parameters. I should help the user by providing complete code that addresses the complex number handling, like printing real and imaginary parts. I will also clarify the wavelength and autoparameter setup for compatibility across different versions.

Clarifying script adjustments and object handling

Lumerical uses SI units in scripting, but for MODE, wavelength is in meters. I'll ensure the solver type is set correctly (likely 3 for 2D Z normal), and check if "name" is locked due to the object state. Let's avoid setting “name” directly and consider selecting the last object to work with.

Improving object handling and property setting

After adding an object with addfde, I’ll store the returned name to avoid issues with object selection. Using mode.setnamed(fde, "property", value) ensures that properties are set without manually selecting the object. I’ll handle the case where some functions may return None by default, like addrect.

Naming strategy and results printing

For the addfde object, we’ll use mode.setnamed(obj, 'name', 'FDE') to set the name, but if the name property is inactive, we’ll rely on the returned name, likely “FDE,” and avoid renaming it. For printing neff and TE fraction, I’ll ensure we check the imaginary part and print it if necessary. I’ll also ensure the GUI stays open after the run, and address the filename for the user's script.

Final code logic and setup

I’ll set the lumerical_path to v251 and define the Sellmeier functions. For materials, I’ll use mode.addmaterial() and handle cases where it might return None by providing a fallback. For the substrate, I'll use an object-defined dielectric. For the upper cladding, I’ll ensure the background is set to air, either through default settings or by adjusting the FDE background index via properties. I'll avoid referencing file contents and citations.

Finalizing object creation and simulation setup

To avoid overlap, I'll define an explicit air cladding rectangle first, followed by the substrate and LN. That way, they override the air material. Instead of creating an air object, I'll set the background material index to 1. The FDE setup will use mode.addfde() and store it for later selection.

For mode data, I'll handle naming and indexing, ensuring the correct path for results. I'll also check for complex values when converting neff.

Thought for 1m 26s

回答

下面给你一份完整可直接运行的脚本（按你 v251 的环境写的）。它已经修复了你遇到的两个问题：

  1. 不再给 FDE 对象 set("name")（有些版本里该属性会显示 inactive）。
  2. neff 在 v251 里可能返回 complex（即使虚部≈0），所以打印时取 real/imag，不再强制转 float 报错。

把下面整段保存为 TFLN_Sapphire_600thi.py 直接运行即可（只需要确认 lumerical_path 是你机器上的实际路径）。

python
import sys
import numpy as np

# ============================================================
# 1) 配置 Lumerical Python API 路径（按你电脑实际安装路径改）
# ============================================================
lumerical_path = r"C:\Program Files\ANSYS Inc\v251\Lumerical\api\python"
if lumerical_path not in sys.path:
    sys.path.append(lumerical_path)

try:
    import lumapi
except ImportError as e:
    raise ImportError(f"无法导入 lumapi，请检查路径: {lumerical_path}") from e


# ============================================================
# 2) Sellmeier：返回折射率 n(λ)，λ 单位：um
# ============================================================
def n_LN_o_zelmon(lam_um: float) -> float:
    lam2 = lam_um**2
    n2 = 1 + 2.6734*lam2/(lam2-0.01764) + 1.2290*lam2/(lam2-0.05914) + 12.614*lam2/(lam2-474.60)
    return float(np.sqrt(n2))

def n_LN_e_zelmon(lam_um: float) -> float:
    lam2 = lam_um**2
    n2 = 1 + 2.9804*lam2/(lam2-0.02047) + 0.5981*lam2/(lam2-0.0666) + 8.9543*lam2/(lam2-416.08)
    return float(np.sqrt(n2))

def n_sapphire_o_malitson(lam_um: float) -> float:
    lam2 = lam_um**2
    c1 = 0.0726631**2
    c2 = 0.1193242**2
    c3 = 18.028251**2
    n2 = 1 + 1.4313493*lam2/(lam2-c1) + 0.65054713*lam2/(lam2-c2) + 5.3414021*lam2/(lam2-c3)
    return float(np.sqrt(n2))


# ============================================================
# 3) 建立材料：TFLN 各向异性 (sampled data)；蓝宝石用 object-defined index
#    晶向：X切 Y传 Z调制
#    在 2D Z-normal FDE（截面 x-y，传播沿 z）里等效为：
#      optic axis (晶体Z) -> 仿真 x
#      => eps_x = n_e^2, eps_y = n_o^2, eps_z = n_o^2
# ============================================================
def build_materials(mode, lambda0_m: float):
    c0 = 299792458.0
    lam_um = lambda0_m * 1e6

    n_o = n_LN_o_zelmon(lam_um)
    n_e = n_LN_e_zelmon(lam_um)
    n_sap = n_sapphire_o_malitson(lam_um)

    f0 = c0 / lambda0_m
    freqs = np.array([0.95*f0, f0, 1.05*f0])

    epsx = (n_e**2) + 0j
    epsy = (n_o**2) + 0j
    epsz = (n_o**2) + 0j

    ln_sampled = np.column_stack([
        freqs,
        epsx*np.ones_like(freqs),
        epsy*np.ones_like(freqs),
        epsz*np.ones_like(freqs),
    ])

    # 删除旧材料（如果存在）
    try:
        mode.deletematerial("TFLN_LN_Xcut_Yprop")
    except Exception:
        pass

    # ✅ addmaterial 返回新材料的真实名字（如 material1），必须用它来 setmaterial
    temp = mode.addmaterial("Sampled data")
    mode.setmaterial(temp, "name", "TFLN_LN_Xcut_Yprop")

    # 有些版本可能没有该属性，try/except 保证不报错
    try:
        mode.setmaterial("TFLN_LN_Xcut_Yprop", "Anisotropy", 1)  # diagonal
    except Exception:
        pass

    mode.setmaterial("TFLN_LN_Xcut_Yprop", "sampled data", ln_sampled)

    try:
        mode.setmaterial("TFLN_LN_Xcut_Yprop", "max coefficients", 2)
    except Exception:
        pass

    return {"n_o": n_o, "n_e": n_e, "n_sap": n_sap}


# ============================================================
# 4) 几何 & FDE 求模
# ============================================================
def simulate_tfln_ridge_fde(
    wg_width_um: float = 3.0,
    lambda_um: float = 4.0,
    tfln_thickness_nm: float = 600.0,
    etch_depth_nm: float = 300.0,
    keep_open: bool = True,
    save_file: str | None = None,
):
    # ---- 单位换算 ----
    lambda0 = lambda_um * 1e-6
    w_wg = wg_width_um * 1e-6
    t_ln = tfln_thickness_nm * 1e-9
    etch = etch_depth_nm * 1e-9
    slab_t = t_ln - etch  # 刻蚀后剩余 slab 厚度

    # 仿真窗口（可按需要调）
    x_span = max(12e-6, 4*w_wg)
    sub_thick = 4e-6
    clad_thick = 4e-6
    y_min = -sub_thick
    y_max = t_ln + clad_thick
    y_span = y_max - y_min
    y_center = 0.5*(y_min + y_max)

    # ---- 启动 MODE ----
    mode = lumapi.MODE(hide=False)
    mode.deleteall()

    mats = build_materials(mode, lambda0)
    print(f"[Info] λ={lambda_um:.3f} um: LN no={mats['n_o']:.4f}, ne={mats['n_e']:.4f}; sapphire n={mats['n_sap']:.4f}")

    # ---- 先放一个空气背景块（更稳，避免背景材质不确定）----
    mode.addrect()
    mode.set("name", "clad_air")
    mode.set("material", "<Object defined dielectric>")
    mode.set("index", 1.0)
    mode.set("x", 0.0)
    mode.set("x span", x_span)
    mode.set("y", y_center)
    mode.set("y span", y_span)
    mode.set("z", 0.0)
    mode.set("z span", 1e-6)

    # ---- 蓝宝石衬底（y in [-sub_thick, 0]）----
    mode.addrect()
    mode.set("name", "substrate_sapphire")
    mode.set("material", "<Object defined dielectric>")
    mode.set("index", mats["n_sap"])
    mode.set("x", 0.0)
    mode.set("x span", x_span)
    mode.set("y", -0.5*sub_thick)
    mode.set("y span", sub_thick)
    mode.set("z", 0.0)
    mode.set("z span", 1e-6)

    # ---- LN slab：厚 slab_t，铺满横向 ----
    mode.addrect()
    mode.set("name", "ln_slab")
    mode.set("material", "TFLN_LN_Xcut_Yprop")
    mode.set("x", 0.0)
    mode.set("x span", x_span)
    mode.set("y", 0.5*slab_t)
    mode.set("y span", slab_t)
    mode.set("z", 0.0)
    mode.set("z span", 1e-6)

    # ---- LN ridge：在 slab 上再加 etch 高度，宽 w_wg ----
    mode.addrect()
    mode.set("name", "ln_ridge")
    mode.set("material", "TFLN_LN_Xcut_Yprop")
    mode.set("x", 0.0)
    mode.set("x span", w_wg)
    mode.set("y", slab_t + 0.5*etch)
    mode.set("y span", etch)
    mode.set("z", 0.0)
    mode.set("z span", 1e-6)

    # ---- FDE region（XY 截面，传播沿 z）----
    # 注意：不要 set("name","FDE")，有些版本 name 属性是 inactive
    fde_name = mode.addfde()
    # 如果 API 没返回名字，则默认就是 "FDE"
    if (fde_name is None) or (str(fde_name).strip() == ""):
        fde_name = "FDE"

    mode.set("solver type", 3)  # 2D Z normal
    mode.set("x", 0.0)
    mode.set("x span", x_span)
    mode.set("y", y_center)
    mode.set("y span", y_span)
    mode.set("z", 0.0)

    # 开边界
    mode.set("x min bc", "PML")
    mode.set("x max bc", "PML")
    mode.set("y min bc", "PML")
    mode.set("y max bc", "PML")

    # 网格（全局 + LN 附近加密）
    mode.set("define x mesh by", "maximum mesh step")
    mode.set("dx", 120e-9)
    mode.set("define y mesh by", "maximum mesh step")
    mode.set("dy", 60e-9)

    mode.addmesh()
    mode.set("name", "mesh_ln")
    mode.set("x", 0.0)
    mode.set("x span", max(6e-6, 2*w_wg))
    mode.set("y", 0.5*t_ln)
    mode.set("y span", t_ln + 0.8e-6)
    mode.set("dx", 30e-9)
    mode.set("dy", 20e-9)

    # ---- 求模设置 ----
    try:
        mode.select(fde_name)
    except Exception:
        # 如果 select 失败，尝试默认名
        mode.select("FDE")
        fde_name = "FDE"

    mode.setanalysis("wavelength", lambda0)
    mode.setanalysis("number of trial modes", 8)

    # ---- 求解 ----
    n_found = int(np.array(mode.findmodes()).squeeze())
    print(f"[Result] 找到模式数: {n_found}")

    # ---- 结果打印（neff 在某些版本会返回 complex，哪怕虚部为 0）----
    n_report = min(n_found, 6)
    for i in range(1, n_report + 1):
        obj = f"{fde_name}::data::mode{i}"

        neff = mode.getdata(obj, "neff")
        neff_c = complex(np.array(neff).squeeze())  # ✅ 强制转成 Python complex
        neff_re = neff_c.real
        neff_im = neff_c.imag

        # TE fraction 也做一下保险处理
        tefrac_val = np.nan
        try:
            tefrac = mode.getdata(obj, "TE polarization fraction")
            tefrac_val = float(np.real(np.array(tefrac).squeeze()))
        except Exception:
            pass

        if abs(neff_im) < 1e-12:
            print(f"  mode{i}: neff = {neff_re:.6f},  TE_frac = {tefrac_val:.4f}")
        else:
            print(f"  mode{i}: neff = {neff_re:.6f} + j{neff_im:.3e},  TE_frac = {tefrac_val:.4f}")

    # 可选：保存工程
    if save_file:
        try:
            mode.save(save_file)
            print(f"[Info] 工程已保存: {save_file}")
        except Exception as e:
            print(f"[Warn] 保存失败: {e}")

    if keep_open:
        input("仿真完成。按 Enter 退出并关闭 MODE...")

    try:
        mode.close()
    except Exception:
        pass

    return mode


if __name__ == "__main__":
    simulate_tfln_ridge_fde(
        wg_width_um=3.0,
        lambda_um=4.0,
        tfln_thickness_nm=600.0,
        etch_depth_nm=300.0,
        keep_open=True,
        # save_file="tfln_ridge_on_sapphire_4um.lms"
        save_file=None,
    )

如果你接下来想把模式场（Ex/Ey/Ez 或 |E|²）导出来到 .mat/.npz 或者自动画图/保存图片，我也可以在这个脚本基础上直接加上对应的 getdata(...,"Ex") 等导出段。

問題

还是报错！(base) PS C:\Users\47004\Desktop\TFLN_Sim> & "C:/Program Files/ANSYS Inc/v251/Lumerical/python-3.9.9-embed-amd64/python.exe" c:/Users/47004/Desktop/TFLN_Sim/TFLN_Sapphire_600thi_2.py
Traceback (most recent call last):
File "c:\Users\47004\Desktop\TFLN_Sim\TFLN_Sapphire_600thi_2.py", line 103, in <module>
save_file: str | None = None,
TypeError: unsupported operand type(s) for |: 'type' and 'NoneType'

思考

Refining code for compatibility and robustness

I need to fix a few things for compatibility across Python versions, like replacing str | None with Optional[str]. Also, the lumapi.MODE(hide=False) should accept the hide argument. I’m thinking of handling some potential issues around how we deal with mode objects, such as naming and selecting 'FDE'. I’ll need to double-check how to handle missing return values more robustly.

Thought for 22s

回答

你这个报错不是 Lumerical 的问题，而是 你在用的 Python 是 3.9.9（Lumerical 自带的 embed python），它不支持 str | None 这种写法（这是 Python 3.10 才支持的 PEP604）。把它改成 Optional[str]（或直接去掉类型标注）就能跑。

下面是我给你的完整可直接运行版（已把 str | None 全部改掉，同时保留你前面已经跑通的：不改 FDE name、neff 可能为 complex 的处理）。

直接保存为 TFLN_Sapphire_600thi_2.py 运行即可。

python
import sys
import numpy as np
from typing import Optional

# ============================================================
# 1) 配置 Lumerical Python API 路径（按你电脑实际安装路径改）
# ============================================================
lumerical_path = r"C:\Program Files\ANSYS Inc\v251\Lumerical\api\python"
if lumerical_path not in sys.path:
    sys.path.append(lumerical_path)

try:
    import lumapi
except ImportError as e:
    raise ImportError(f"无法导入 lumapi，请检查路径: {lumerical_path}") from e


# ============================================================
# 2) Sellmeier：返回折射率 n(λ)，λ 单位：um
# ============================================================
def n_LN_o_zelmon(lam_um: float) -> float:
    lam2 = lam_um**2
    n2 = 1 + 2.6734*lam2/(lam2-0.01764) + 1.2290*lam2/(lam2-0.05914) + 12.614*lam2/(lam2-474.60)
    return float(np.sqrt(n2))

def n_LN_e_zelmon(lam_um: float) -> float:
    lam2 = lam_um**2
    n2 = 1 + 2.9804*lam2/(lam2-0.02047) + 0.5981*lam2/(lam2-0.0666) + 8.9543*lam2/(lam2-416.08)
    return float(np.sqrt(n2))

def n_sapphire_o_malitson(lam_um: float) -> float:
    lam2 = lam_um**2
    c1 = 0.0726631**2
    c2 = 0.1193242**2
    c3 = 18.028251**2
    n2 = 1 + 1.4313493*lam2/(lam2-c1) + 0.65054713*lam2/(lam2-c2) + 5.3414021*lam2/(lam2-c3)
    return float(np.sqrt(n2))


# ============================================================
# 3) 建立材料：TFLN 各向异性 (sampled data)；蓝宝石用 object-defined index
#    晶向：X切 Y传 Z调制
#    在 2D Z-normal FDE（截面 x-y，传播沿 z）里等效为：
#      optic axis (晶体Z) -> 仿真 x
#      => eps_x = n_e^2, eps_y = n_o^2, eps_z = n_o^2
# ============================================================
def build_materials(mode, lambda0_m: float):
    c0 = 299792458.0
    lam_um = lambda0_m * 1e6

    n_o = n_LN_o_zelmon(lam_um)
    n_e = n_LN_e_zelmon(lam_um)
    n_sap = n_sapphire_o_malitson(lam_um)

    f0 = c0 / lambda0_m
    freqs = np.array([0.95*f0, f0, 1.05*f0])

    epsx = (n_e**2) + 0j
    epsy = (n_o**2) + 0j
    epsz = (n_o**2) + 0j

    ln_sampled = np.column_stack([
        freqs,
        epsx*np.ones_like(freqs),
        epsy*np.ones_like(freqs),
        epsz*np.ones_like(freqs),
    ])

    # 删除旧材料（如果存在）
    try:
        mode.deletematerial("TFLN_LN_Xcut_Yprop")
    except Exception:
        pass

    # addmaterial 返回新材料实际名字（如 material1），必须用它来 setmaterial
    temp = mode.addmaterial("Sampled data")
    mode.setmaterial(temp, "name", "TFLN_LN_Xcut_Yprop")

    try:
        mode.setmaterial("TFLN_LN_Xcut_Yprop", "Anisotropy", 1)  # diagonal（若该属性存在）
    except Exception:
        pass

    mode.setmaterial("TFLN_LN_Xcut_Yprop", "sampled data", ln_sampled)

    try:
        mode.setmaterial("TFLN_LN_Xcut_Yprop", "max coefficients", 2)
    except Exception:
        pass

    return {"n_o": n_o, "n_e": n_e, "n_sap": n_sap}


# ============================================================
# 4) 几何 & FDE 求模
# ============================================================
def simulate_tfln_ridge_fde(
    wg_width_um: float = 3.0,
    lambda_um: float = 4.0,
    tfln_thickness_nm: float = 600.0,
    etch_depth_nm: float = 300.0,
    keep_open: bool = True,
    save_file: Optional[str] = None,   # ✅ Python3.9 兼容写法
):
    # ---- 单位换算 ----
    lambda0 = lambda_um * 1e-6
    w_wg = wg_width_um * 1e-6
    t_ln = tfln_thickness_nm * 1e-9
    etch = etch_depth_nm * 1e-9
    slab_t = t_ln - etch  # 刻蚀后剩余 slab 厚度

    # 仿真窗口
    x_span = max(12e-6, 4*w_wg)
    sub_thick = 4e-6
    clad_thick = 4e-6
    y_min = -sub_thick
    y_max = t_ln + clad_thick
    y_span = y_max - y_min
    y_center = 0.5*(y_min + y_max)

    # ---- 启动 MODE ----
    mode = lumapi.MODE(hide=False)
    mode.deleteall()

    mats = build_materials(mode, lambda0)
    print(f"[Info] λ={lambda_um:.3f} um: LN no={mats['n_o']:.4f}, ne={mats['n_e']:.4f}; sapphire n={mats['n_sap']:.4f}")

    # ---- 背景空气块（更稳）----
    mode.addrect()
    mode.set("name", "clad_air")
    mode.set("material", "<Object defined dielectric>")
    mode.set("index", 1.0)
    mode.set("x", 0.0)
    mode.set("x span", x_span)
    mode.set("y", y_center)
    mode.set("y span", y_span)
    mode.set("z", 0.0)
    mode.set("z span", 1e-6)

    # ---- 蓝宝石衬底 ----
    mode.addrect()
    mode.set("name", "substrate_sapphire")
    mode.set("material", "<Object defined dielectric>")
    mode.set("index", mats["n_sap"])
    mode.set("x", 0.0)
    mode.set("x span", x_span)
    mode.set("y", -0.5*sub_thick)
    mode.set("y span", sub_thick)
    mode.set("z", 0.0)
    mode.set("z span", 1e-6)

    # ---- LN slab ----
    mode.addrect()
    mode.set("name", "ln_slab")
    mode.set("material", "TFLN_LN_Xcut_Yprop")
    mode.set("x", 0.0)
    mode.set("x span", x_span)
    mode.set("y", 0.5*slab_t)
    mode.set("y span", slab_t)
    mode.set("z", 0.0)
    mode.set("z span", 1e-6)

    # ---- LN ridge ----
    mode.addrect()
    mode.set("name", "ln_ridge")
    mode.set("material", "TFLN_LN_Xcut_Yprop")
    mode.set("x", 0.0)
    mode.set("x span", w_wg)
    mode.set("y", slab_t + 0.5*etch)
    mode.set("y span", etch)
    mode.set("z", 0.0)
    mode.set("z span", 1e-6)

    # ---- FDE region（不要 set name，避免 name inactive）----
    fde_name = mode.addfde()
    if (fde_name is None) or (str(fde_name).strip() == ""):
        fde_name = "FDE"

    mode.set("solver type", 3)  # 2D Z normal（截面 x-y，传播 z）
    mode.set("x", 0.0)
    mode.set("x span", x_span)
    mode.set("y", y_center)
    mode.set("y span", y_span)
    mode.set("z", 0.0)

    # 边界
    mode.set("x min bc", "PML")
    mode.set("x max bc", "PML")
    mode.set("y min bc", "PML")
    mode.set("y max bc", "PML")

    # 网格
    mode.set("define x mesh by", "maximum mesh step")
    mode.set("dx", 120e-9)
    mode.set("define y mesh by", "maximum mesh step")
    mode.set("dy", 60e-9)

    mode.addmesh()
    mode.set("name", "mesh_ln")
    mode.set("x", 0.0)
    mode.set("x span", max(6e-6, 2*w_wg))
    mode.set("y", 0.5*t_ln)
    mode.set("y span", t_ln + 0.8e-6)
    mode.set("dx", 30e-9)
    mode.set("dy", 20e-9)

    # ---- 求模设置 ----
    try:
        mode.select(fde_name)
    except Exception:
        mode.select("FDE")
        fde_name = "FDE"

    mode.setanalysis("wavelength", lambda0)
    mode.setanalysis("number of trial modes", 8)

    # ---- 求解 ----
    n_found = int(np.array(mode.findmodes()).squeeze())
    print(f"[Result] 找到模式数: {n_found}")

    # ---- 打印结果（neff 可能是 complex，哪怕虚部为 0）----
    n_report = min(n_found, 6)
    for i in range(1, n_report + 1):
        obj = f"{fde_name}::data::mode{i}"

        neff = mode.getdata(obj, "neff")
        neff_c = complex(np.array(neff).squeeze())
        neff_re, neff_im = neff_c.real, neff_c.imag

        tefrac_val = np.nan
        try:
            tefrac = mode.getdata(obj, "TE polarization fraction")
            tefrac_val = float(np.real(np.array(tefrac).squeeze()))
        except Exception:
            pass

        if abs(neff_im) < 1e-12:
            print(f"  mode{i}: neff = {neff_re:.6f},  TE_frac = {tefrac_val:.4f}")
        else:
            print(f"  mode{i}: neff = {neff_re:.6f} + j{neff_im:.3e},  TE_frac = {tefrac_val:.4f}")

    # 可选：保存工程
    if save_file:
        try:
            mode.save(save_file)
            print(f"[Info] 工程已保存: {save_file}")
        except Exception as e:
            print(f"[Warn] 保存失败: {e}")

    if keep_open:
        input("仿真完成。按 Enter 退出并关闭 MODE...")

    try:
        mode.close()
    except Exception:
        pass


if __name__ == "__main__":
    simulate_tfln_ridge_fde(
        wg_width_um=3.0,
        lambda_um=4.0,
        tfln_thickness_nm=600.0,
        etch_depth_nm=300.0,
        keep_open=True,
        save_file=None,  # 或者 "tfln_ridge_on_sapphire_4um.lms"
    )

如果你运行后还有新的报错（比如 getdata 的字段名在你安装里不同），把报错全文贴出来就行；我会按 v251 的实际字段名把 neff/损耗/模式场导出那部分也一起做成“零报错版”。

問題

很好，你现在写的这个FDE仿真已经很棒了。接下来我想用charge仿真这样的铌酸锂波导的电光调制效率。请你把铌酸锂的参数设置为厚600nm刻蚀300nm，4um波段，波导倾角为90度，然后电极的间距，宽度，厚度等参数可以设置，你暂时选一个认为比较好的参数。然后给我仿真出来调制效率也就是VpaiL 。 请你帮我写好python脚本代码

問題

很好，你现在写的这个FDE仿真已经很棒了。接下来我想用charge仿真这样的铌酸锂波导的电光调制效率。请你把铌酸锂的参数设置为厚600nm刻蚀300nm，4um波段，波导倾角为90度，然后电极的间距，宽度，厚度等参数可以设置，你暂时选一个认为比较好的参数。然后给我仿真出来调制效率也就是VpaiL 。 请你帮我写好python脚本代码

注意我是用的是2025R1版本的lumerical，请你自己搜索他的charge仿真如何调用

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