optics{ global_refractive_index{ } }

  • using: \(\mathrm{\textcolor{ForestGreen}{optional\;within\;the\;scope}}\)

  • items: \(\mathrm{maximum\;1}\)

This group is used to specify the effective refractive index \(n_\mathrm{eff}(\lambda)\) of the modelled device.

Important

The following general conditions must be satisfied when defining optics{ global_refractive_index{ } }

Maintained Keywords

The keywords below are available in at least one of currently published releases and are planned to be included also in the next release.

database_spectrum{ }

  • using: \(\mathrm{\textcolor{ForestGreen}{optional\;within\;the\;scope}}\)

  • items: \(\mathrm{maximum\;1}\)

Importing the spectrum from the database or external files.

database_spectrum{ name }

  • using: \(\mathrm{\textcolor{WildStrawberry}{required\;within\;the\;scope}}\)

  • type: \(\mathrm{character\;string}\)

Name of the spectrum contained in the database.

import_spectrum{ }

  • using: \(\mathrm{\textcolor{ForestGreen}{optional\;within\;the\;scope}}\)

  • items: \(\mathrm{maximum\;1}\)

Importing spectrum from a file

Important

The following general conditions must be satisfied when defining import_spectrum{ }

  • The global group import{ } is specified in the input file.

import_spectrum{ import_n_from }

  • using: \(\mathrm{\textcolor{WildStrawberry}{required\;within\;the\;scope}}\)

  • type: \(\mathrm{character\;string}\)

Path to a spectrum of the real part of the refractive index for importing

import_spectrum{ import_k_from }

  • using: \(\mathrm{\textcolor{ForestGreen}{optional\;within\;the\;scope}}\)

  • type: \(\mathrm{character\;string}\)

Path to a spectrum of the imaginary part of the refractive index for importing

import_spectrum{ cutoff }

  • using: \(\mathrm{\textcolor{WildStrawberry}{required\;within\;the\;scope}}\)

  • type: \(\mathrm{choice}\)

  • choices: yes; no

If set to yes, then the values of the spectrum which are outside the definition interval are set to zero. Otherwise, the spectrum is extrapolated as a constant with the value on the boundary of the imported data.

import_spectrum{ energy_spectrum }

  • using: \(\mathrm{\textcolor{ForestGreen}{optional\;within\;the\;scope}}\)

  • type: \(\mathrm{choice}\)

  • choices: yes; no

  • default: no

If set to yes, then the imported spectrum is assumed to be given as a function of energy. Otherwise, the spectrum is assumed to be given as a function of wavelength.

constant_spectrum{ }

  • using: \(\mathrm{\textcolor{ForestGreen}{optional\;within\;the\;scope}}\)

  • items: \(\mathrm{maximum\;1}\)

Specify a constant refractive index spectrum

constant_spectrum{ n }

  • using: \(\mathrm{\textcolor{WildStrawberry}{required\;within\;the\;scope}}\)

  • type: \(\mathrm{real\;number}\)

  • values: (0.0, ...)

  • unit: \(\mathrm{-}\)

  • default: 1.0

Constant value of the real part of the refractive index.

constant_spectrum{ k }

  • using: \(\mathrm{\textcolor{ForestGreen}{optional\;within\;the\;scope}}\)

  • type: \(\mathrm{real\;number}\)

  • values: no constraints

  • unit: \(\mathrm{-}\)

  • default: 0.0

Constant value of the imaginary part of the refractive index.

compute_absorption_coeff{ }

  • using: \(\mathrm{\textcolor{WildStrawberry}{required\;within\;the\;scope}}\)

  • type: \(\mathrm{choice}\)

  • choices: yes; no

Calculate absorption coefficient from imaginary part of the reflective index.