منابع مشابه
Photon diffusion coefficient in an absorbing medium.
A number of investigators have recently claimed, based on both analysis from transport theory and transport-theory-based Monte Carlo calculations, that the diffusion coefficient for photon migration should be taken to be independent of absorption. We show that these analyses are flawed and that the correct way of extracting diffusion theory from transport theory gives an absorption-dependent di...
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Frequency dependence of the photonic noise spectrum in an absorbing or amplifying diffusive medium
A theory is presented for the frequency dependence of the power spectrum of photon current fluctuations originating from a disordered medium. Both the cases of an absorbing medium (“grey body”) and of an amplifying medium (“random laser”) are considered in a waveguide geometry. The semiclassical approach (based on a Boltzmann-Langevin equation) is shown to be in complete agreement with a fully ...
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ژورنال
عنوان ژورنال: JAMA: The Journal of the American Medical Association
سال: 1901
ISSN: 0098-7484
DOI: 10.1001/jama.1901.52470040028001j