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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 17, Iss. 9 — Apr. 27, 2009
  • pp: 6975–6981

Controllable transport mean free path of light in xerogel matrixes embedded with polystyrene spheres

Boris P. J. Bret, Nuno J. G. Couto, Mariana Amaro, Eduardo J. Nunes-Pereira, and Michael Belsley  »View Author Affiliations

Optics Express, Vol. 17, Issue 9, pp. 6975-6981 (2009)

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Xerogel matrices, made by sol-gel techniques, are embedded with polystyrene spheres to promote multiple scattering of light. Varying the concentration of the spheres inside the matrix allows one to adjust the transport mean free path of light inside the material. Coherent backscattering measurements show that a range of transport mean free paths from 90 to 600 nm is easily achieved. The determination of the matrix refractive index permits a direct comparison to multiple scattering and Mie theory. Such tunable diffusive sol-gel derived samples can be further optimized as random laser materials.

© 2009 Optical Society of America

OCIS Codes
(030.1670) Coherence and statistical optics : Coherent optical effects
(160.2710) Materials : Inhomogeneous optical media

ToC Category:
Coherence and Statistical Optics

Original Manuscript: January 14, 2009
Revised Manuscript: January 28, 2009
Manuscript Accepted: January 29, 2009
Published: April 13, 2009

Boris P. Bret, Nuno J. Couto, Mariana Amaro, Eduardo J. Nunes-Pereira, and Michael Belsley, "Controllable transport mean free path of light in xerogel matrixes embedded with polystyrene spheres," Opt. Express 17, 6975-6981 (2009)

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Fig. 1. Fig. 2. Fig. 3.

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