optics{ global_absorption_coeff{ } }

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

  • items: \(\mathrm{maximum\;1}\)

This group is used to specify the global absorption spectrum for the entire device.

Important

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

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 absorption spectra 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{ }

import_spectrum{ import_from }

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

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

Path to a spectrum 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.

import_spectrum{ decadic_absorption_unit }

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

  • type: \(\mathrm{choice}\)

  • choices: yes; no

  • default: no

If set to yes, then the optical absorption coefficient is assumed to be expressed in \(\mathrm{dB/}\mu\mathrm{m}\).

constant_spectrum{ }

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

  • items: \(\mathrm{maximum\;1}\)

Specify a constant absorption spectrum

Important

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

  • Exactly one of the following must be defined: absorption_coeff, decadic_absorption_coeff within this group.

constant_spectrum{ absorption_coeff }

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

  • type: \(\mathrm{real\;number}\)

  • values: no constraints

  • unit: \(\mathrm{cm^{-1}}\)

The constant value of the absorption coefficient expressed in \(1/cm\)

constant_spectrum{ decadic_absorption_coeff }

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

  • type: \(\mathrm{real\;number}\)

  • values: no constraints

  • unit: \(\mathrm{dB/}\mu\mathrm{m}\)

The constant value of the absorption coefficient expressed in \(\mathrm{dB/}\mu\mathrm{m}\)

Examples

global_absorption_coeff{
    database_spectrum{
        name = "GaAs"
    }
}

global_absorption_coeff{
    import_spectrum{
        import_from = "filename"
        cutoff = yes  # yes/no: If yes, set values outside definition interval to zero.
                    # (default=?)
        decadic_absorption_unit = no # yes or no, default: no
    }
}

global_absorption_coeff{
    constant_spectrum{
        absorption = 0.5  # real value >= 0.0 [1/cm]
        # or
        decadic_absorption = 0.0 # real value >= 0.0
    }
}