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Journal of the Optical Society of America A

Journal of the Optical Society of America A


  • Editor: Stephen A. Burns
  • Vol. 23, Iss. 5 — May. 1, 2006
  • pp: 1106–1110

Photon diffusion coefficient in scattering and absorbing media

Romain Pierrat, Jean-Jacques Greffet, and Rémi Carminati  »View Author Affiliations

JOSA A, Vol. 23, Issue 5, pp. 1106-1110 (2006)

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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 = c l * 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.

© 2006 Optical Society of America

OCIS Codes
(170.3660) Medical optics and biotechnology : Light propagation in tissues
(170.5280) Medical optics and biotechnology : Photon migration
(290.1990) Scattering : Diffusion
(290.4210) Scattering : Multiple scattering
(290.7050) Scattering : Turbid media

ToC Category:

Original Manuscript: August 26, 2005
Revised Manuscript: November 25, 2005
Manuscript Accepted: November 27, 2005

Virtual Issues
Vol. 1, Iss. 6 Virtual Journal for Biomedical Optics

Romain Pierrat, Jean-Jacques Greffet, and Rémi Carminati, "Photon diffusion coefficient in scattering and absorbing media," J. Opt. Soc. Am. A 23, 1106-1110 (2006)

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