Abstract

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.

© 2006 Optical Society of America

Full Article  |  PDF Article
Related Articles
Photon diffusion coefficient in an absorbing medium

Raphael Aronson and Noel Corngold
J. Opt. Soc. Am. A 16(5) 1066-1071 (1999)

Photon migration through a turbid slab described by a model based on diffusion approximation. I. Theory

Daniele Contini, Fabrizio Martelli, and Giovanni Zaccanti
Appl. Opt. 36(19) 4587-4599 (1997)

Definition of the diffusion coefficient in scattering and absorbing media

Rachid Elaloufi, Rémi Carminati, and Jean-Jacques Greffet
J. Opt. Soc. Am. A 20(4) 678-685 (2003)

References

You do not have subscription access to this journal. Citation lists with outbound citation links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Equations (15)

You do not have subscription access to this journal. Equations are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Metrics

You do not have subscription access to this journal. Article level metrics are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription