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Phys. Rev. E 71, 055603(R) (2005) [4 pages]

Coherent backscattering of light by nonlinear scatterers

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T. Wellens1,2, B. Grémaud2, D. Delande2, and C. Miniatura1
1Institut Non Linéaire de Nice, UMR 6618, 1361 route des Lucioles, F-06560 Valbonne, France
2Laboratoire Kastler Brossel, Université Pierre et Marie Curie, 4 Place Jussieu, F-75005 Paris, France

Received 22 November 2004; published 31 May 2005

We theoretically study the propagation of light in a disordered medium with nonlinear scatterers. We especially focus on interference effects between reversed multiple scattering paths, which lead to weak localization and coherent backscattering. We show that, in the presence of weakly nonlinear scattering, constructive interferences exist in general between three different scattering amplitudes. This effect influences the nonlinear backscattering enhancement factor, which may thus exceed the linear barrier two.

© 2005 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevE.71.055603
DOI:
10.1103/PhysRevE.71.055603
PACS:
42.25.Dd, 32.80.−t, 42.65.−k