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Broadband coherent backscattering spectroscopy of the interplay between order and disorder in three-dimensional opal photonic crystals

Broadband coherent backscattering spectroscopy of the interplay between order and disorder in three-dimensional opal photonic crystals
Broadband coherent backscattering spectroscopy of the interplay between order and disorder in three-dimensional opal photonic crystals
We present an investigation of coherent backscattering of light that is multiple scattered by a photonic crystal by using a broadband technique. The results significantly extend on previous backscattering measurements on photonic crystals by simultaneously accessing a large frequency and angular range. Backscatter cones around the stop gap are successfully modeled with diffusion theory for a random medium. Strong variations of the apparent mean free path and the cone enhancement are observed around the stop band. The variations of the mean free path are described by a semiempirical three-gap model including band structure effects on the internal reflection and penetration depth. A good match between theory and experiment is obtained without the need of additional contributions of group velocity or density of states. It is found that the internal reflection contribution does not improve the semiempirical fits. We argue that the cone enhancement reveals additional information on directional transport properties that are otherwise averaged out in diffuse multiple scattering
1550-235X
155101-[9pp]
Muskens, Otto
2284101a-f9ef-4d79-8951-a6cda5bfc7f9
Koenderink, A.
418bf99b-5642-4bc4-a442-c3a3e87c056d
Vos, Willem
7a12f6b1-f507-4e49-bd1d-a8b799e7783a
Muskens, Otto
2284101a-f9ef-4d79-8951-a6cda5bfc7f9
Koenderink, A.
418bf99b-5642-4bc4-a442-c3a3e87c056d
Vos, Willem
7a12f6b1-f507-4e49-bd1d-a8b799e7783a

Muskens, Otto, Koenderink, A. and Vos, Willem (2011) Broadband coherent backscattering spectroscopy of the interplay between order and disorder in three-dimensional opal photonic crystals. Physical Review B, 83 (15), 155101-[9pp]. (doi:10.1103/PhysRevB.83.155101).

Record type: Article

Abstract

We present an investigation of coherent backscattering of light that is multiple scattered by a photonic crystal by using a broadband technique. The results significantly extend on previous backscattering measurements on photonic crystals by simultaneously accessing a large frequency and angular range. Backscatter cones around the stop gap are successfully modeled with diffusion theory for a random medium. Strong variations of the apparent mean free path and the cone enhancement are observed around the stop band. The variations of the mean free path are described by a semiempirical three-gap model including band structure effects on the internal reflection and penetration depth. A good match between theory and experiment is obtained without the need of additional contributions of group velocity or density of states. It is found that the internal reflection contribution does not improve the semiempirical fits. We argue that the cone enhancement reveals additional information on directional transport properties that are otherwise averaged out in diffuse multiple scattering

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Published date: April 2011

Identifiers

Local EPrints ID: 180405
URI: http://eprints.soton.ac.uk/id/eprint/180405
ISSN: 1550-235X
PURE UUID: 2ae5e569-dbbd-493d-9f2d-39fc90e2db60
ORCID for Otto Muskens: ORCID iD orcid.org/0000-0003-0693-5504

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Date deposited: 11 Apr 2011 10:38
Last modified: 10 Dec 2019 01:40

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Author: Otto Muskens ORCID iD
Author: A. Koenderink
Author: Willem Vos

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