Enhanced backscattering of light by disordered media: effects of spatial coherence

Takashi Okamoto

doi:10.1117/12.2299083

1 September 1996 Enhanced backscattering of light by disordered media: effects of spatial coherence

Takashi Okamoto

Proceedings Volume 2778, 17th Congress of the International Commission for Optics: Optics for Science and New Technology; 27785K (1996) https://doi.org/10.1117/12.2299083
Event: 17th Congress of the International Commission for Optics: Optics for Science and New Technology, 1996, Taejon, Korea, Republic of

Abstract

Coherent backscattering of light from random media has been studied intensively because of its relation to weak localization of photons [1]. Constructive interference of waves following a certain path and its time-reversed path in the medium yields an enhancement in the backscat- tered intensity. When the term "constructive interference" is used for the explanation of the origin of this enhancement, we implicitly as- sume that the light is perfectly coherent. Most of the studies relating to the coherent backscat- tering have been done under this assumption. In this paper we present an analytical ex- pression for a shape of the backscattering cone formed under illumination of the light with ar- bitrary spatial coherence. In a formulation, the statistical properties of the illuminating light is given by the angular correlation func- tion [2], which characterizes the correlation between two components of the angular spec- trum [3] of a light field. This plane-wave de- composition of the field allows us to make use of the analytical expressions [4] developed pre- viously for the coherent backscattering of scalar waves.

Citation Download Citation

Takashi Okamoto "Enhanced backscattering of light by disordered media: effects of spatial coherence", Proc. SPIE 2778, 17th Congress of the International Commission for Optics: Optics for Science and New Technology, 27785K (1 September 1996); https://doi.org/10.1117/12.2299083

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