Optics with gradients of free carrier concentration

Keßler, F. R.

doi:10.1007/bfb0107801

Cited by 4 publications

(2 citation statements)

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“…Researchers who discuss the mixed Poynting vector almost universally assert that μ is "small" and therefore can be neglected. [28][29][30][31] However, if one proceeds to substitute n; k values for example materials into Eq. ( 34), one quickly finds that μ can be surprisingly large in the thermal infrared domain for a wide class of materials.…”

Section: Polarization and The Complex Fresnel Equationsmentioning

confidence: 99%

Review of thermal infrared polarimetry, I: theory

Hagen

2022

Opt. Eng.

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We review the physics underlying thermal infrared emission, focusing on the processes that generate polarization. We also discuss a number of features of the theory that are not widely discussed in the literature, including the Straubel theorem for absorbing media, the mixed Poynting vector, and the emission of nonisothermal media. Using a model for emission from nonisothermal media, we present a quantitative discussion of the conditions under which Kirchhoff's law is valid. Using this model, we show how it is possible for many blackbody simulators and infrared camera shutters to produce emission very close to true blackbodies.

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Section: Polarization and The Complex Fresnel Equationsmentioning

confidence: 99%

Review of thermal infrared polarimetry, I: theory

Hagen

2022

Opt. Eng.

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“…A number of other consequences and special cases of the general laws (29)- (31) and 32 (23). (32) (c) We investigate the conditions for the occurrence of the unusual case A # 0.…”

Section: Kinematics: Generalized Snell-descartes Lawsmentioning

confidence: 99%

Generalization of complex Snell–Descartes and Fresnel laws

1994

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Generalized Snell-Descartes and Fresnel laws are derived for harmonic inhomogeneous plane waves that are incident upon a static interface between two continuous absorbing dielectric media that are macroscopically characterized by their electric and magnetic permittivities and their conductivities. A coordinate-free formalism based on complex vector algebra is used to carry out all discussions. Surprisingly, the usual complex Snell-Descartes laws for reflection and refraction and Fresnel laws for polarization are recovered only in the special case in which the vector characterizing the direction of inhomogeneity is in the plane of incidence. In the more general case a new deflection angle between planes of incidence and refraction has to be introduced. An experiment is proposed to test this prediction. A generalized form of the TE and TM modes (with respect to the interface), which are elliptically polarized and which are called parallel electric and parallel magnetic modes, also emerges.

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