# Encoding: utf-8
"""Dispersion specified by a table of wavelengths (nm) and refractive index values."""
import numpy as np
import numpy.typing as npt
import scipy.interpolate
from .base_dispersion import Dispersion, InvalidParameters
[docs]class Table(Dispersion):
"""Dispersion specified by a table of wavelengths (nm) and refractive index values.
Please not that this model will produce errors for wavelengths outside the provided
wavelength range.
Single parameters:
:lbda (list): Wavelengths in nm. Defaults to np.linspace(0, 3000, 1000).
:epsilon: Complex refractive index values in the convention n + ik.
Defaults to np.ones(1000).
Repeated parameters:
--
Output:
The interpolation in the given wavelength range.
"""
single_params_template = {"lbda": np.linspace(0, 3000, 1000), "n": np.ones(1000)}
rep_params_template = {}
def __init__(self, *args, **kwargs) -> None:
super().__init__(*args, **kwargs)
if len(self.single_params.get("lbda")) == 0:
raise InvalidParameters("Wavelength array cannot be of length zero.")
if len(self.single_params.get("n")) != len(self.single_params.get("lbda")):
raise InvalidParameters(
"Wavelength and refractive index arrays must have the same length."
)
self.interpolation = scipy.interpolate.interp1d(
self.single_params.get("lbda"),
self.single_params.get("n") ** 2,
kind="cubic",
)
def dielectric_function(self, lbda: npt.ArrayLike) -> npt.NDArray:
return self.interpolation(lbda)