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Article Dans Une Revue Journal of the Optical Society of America. A Optics, Image Science, and Vision Année : 2006

Photon diffusion coefficient in scattering and absorbing media

Résumé

We present a unified derivation of the photon diffusion coefficient for both steady-state and time-dependent transport in disordered absorbing media. The derivation is based on a modal analysis of the time-dependent radiative transfer equation. This approach confirms that the dynamic diffusion coefficient is given by the random-walk result D =cl*/3, where l* is the transport mean free path and c is the energy velocity, independent of the level of absorption. It also shows that the diffusion coefficient for steady-state transport, often used in biomedical optics, depends on absorption, in agreement with recent theoretical and experimental works. These two results resolve a recurrent controversy in light propagation and imaging in scattering media.
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Dates et versions

hal-00133245 , version 1 (24-02-2007)

Identifiants

  • HAL Id : hal-00133245 , version 1

Citer

Rémi Carminati, Jean-Jacques Greffet, Romain Pierrat. Photon diffusion coefficient in scattering and absorbing media. Journal of the Optical Society of America. A Optics, Image Science, and Vision, 2006, 23, pp.1106-1110. ⟨hal-00133245⟩
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