SCATMECH > Classes and Functions > Surface Scattering Models > OneLayer_BRDF_Model

class OneLayer_BRDF_Model

The class OneLayer_BRDF_Model implements the Rayleigh approximation for a defect embedded in a dielectric layer.

Diagram showing the components contributing to the effective BRDF of a sample surrounded by air.

Parameters:

Parameter Data Type Description Default
lambda double Wavelength of the light in vacuum [µm].
(Inherited from BRDF_Model.)		 0.532
type int Indicates whether the light is incident from above the substrate or from within the substrate and whether the scattering is evaluated in reflection or transmission. The choices are:
0 : Light is incident from the above the substrate, and scattering is evaluated in reflection.
1 : Light is incident from the above the substrate, and scattering is evaluated in transmission.
2 : Light is incident from the within the substrate, and scattering is evaluated in reflection.
3 : Light is incident from the within the substrate, and scattering is evaluated in transmission.
For 1, 2, and 3, the substrate must be non-absorbing.
OneLayer_BRDF_Model only supports type=0.
(Inherited from BRDF_Model).		 0
substrate dielectric_function The optical constants of the substrate, expressed as a complex number (n,k) or, optionally, as a function of wavelength.
(Inherited from BRDF_Model.)		 (4.05,0.05)
density double The surface number density of local scatterers [µm-2].
(Inherited from Local_BRDF_Model.)		 1
radius double The radius of the spherical defect [µm]. 0.01
defect dielectric_function The optical constants of the spherical defect, expressed as a complex number (n,k) or, optionally, as a function of wavelength. (1.0,0.0)
film dielectric_function The optical constants of the film, expressed as a complex number (n,k) or, optionally, as a function of wavelength. (1.59,0.0)
tau double The thickness of the film [µm]. 0.05
depth double The distance of the defect from the exposed interface [µm]. 0.00

See also:

SCATMECH Home,   Conventions,   BRDF_Model

T. A. Germer, "Polarized light scattering by microroughness and small defects in dielectric layers," J. Opt. Soc. Am. A 18(6), 1279-1288 (2001).

Include file:

#include "onelayer.h"

Source code:

onelayer.cpp

Definition of public elements:

class OneLayer_BRDF_Model
    : public Local_BRDF_Model
{
};

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Current SCATMECH version: 7.22 (April 2021)