optics{ global_reflectivity{ } }

• usage: $\mathrm{optional}$

• items: maximum 1

This group defines the reflectance spectrum $R(\lambda )$ of the modelled device for the light entering the system.

Important

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

• Exactly one of the following must be defined: database_spectrum{ }, import_spectrum{ }, constant_spectrum{ } within this group.

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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.

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database_spectrum{ }

• usage: $\mathrm{optional}$

• items: maximum 1

Importing the spectrum from the database or external files.

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database_spectrum{ name }

• usage: $\mathrm{required}$

• type: character string

Name of the spectrum contained in the database.

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import_spectrum{ }

• usage: $\mathrm{optional}$

• items: 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.

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import_spectrum{ import_from }

• usage: $\mathrm{required}$

• type: character string

Path to a spectrum for importing

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import_spectrum{ cutoff }

• usage: $\mathrm{required}$

• type: choice

• values: yes or 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.

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import_spectrum{ energy_spectrum }

• usage: $\mathrm{optional}$

• type: choice

• values: yes or 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.

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constant_spectrum{ }

• usage: $\mathrm{optional}$

• items: maximum 1

Specify a constant reflectance spectrum $R(\lambda )=\mathrm{const}$

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constant_spectrum{ reflectivity }

• usage: $\mathrm{required}$

• type: real number

• values: (0.0, 1.0]

• unit: $-$

• default: $r=1.0$

The constant value of the reflectivity

Examples

global_reflectivity{
    database_spectrum{
        name = "Al0.80Ga0.20As"
    }

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

constant_spectrum{
    reflectivity = 0.5  # real value >= 0.0 and <= 1.0 (dimensionless)
}