Physics – Optics
Scientific paper
2008-11-12
Physics
Optics
Updated figures and correcting typos. 5 pages, 3 figures
Scientific paper
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.
Amaro Mariana
Belsley Michael
Bret Boris P. J.
Couto Nuno J. G.
Nunes-Pereira Eduardo J.
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