import from file

Lets the user select a file to import optical constants

import from workbook

Imports optical constants from the workbook. Columns must contain spectral position, n and k.

import df from workbook

Imports optical constants from the workbook. Columns must contain spectral position, real and imaginary part of the dielectric function.

add kim oscillator, new name, expression for resonance frequency, expression for oscillator strength, expression for damping constant, expression for Gauss-Lorentz switch

Adds a Kim oscillator to the list of susceptibilities named as specified. The values for resonance frequencies, oscillator strength, damping constant and Gauss-Lorentz switch are taken from expressions which may involve optical functions. This allows to generate a new oscillator at a frequency for which the difference between simulated and measured spectra is largest.