Enhanced backscattering from photonic crystals

A. Femius Koenderink, Mischa Megens, Gijs Van Soest, Willem L. Vos, Ad Lagendijk

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84 Citations (Scopus)

Abstract

We have studied enhanced backscattering of both polystyrene opals and strongly photonic crystals of air spheres in TiO2 in the wavelength range of first and higher order stop bands. The shape of the enhanced backscattering cones is well described by diffusion theory. We find transport mean free paths of the order of 15 μm both for opals and air spheres. Close to the stop band the cone width is decreased due to internal reflections generated by the photonic band structure. Widening occurs due to attenuation of the coherent beam by Bragg scattering. We present a model that incorporates these effects and successfully explains the data. (C) 2000 Elsevier Science B.V.

Original languageEnglish
Pages (from-to)104-111
Number of pages8
JournalPhysics Letters, Section A: General, Atomic and Solid State Physics
Volume268
Issue number1-2
DOIs
Publication statusPublished - 3 Apr 2000

Bibliographical note

The authors would like to acknowledge Henry van Driel for reflectivity measurements of the opals, and Judith Wijnhoven for sample preparation. We thank Frank Poelwijk, Frank Schuurmans and Henry Schriemer for help with experiments and valuable discussions.

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