Controllable transport mean free path of light in xerogel matrixes embedded with polystyrene spheres
| Autor: | Mariana Amaro, Michael Belsley, Boris P. J. Bret, Nuno J. G. Couto, Eduardo J. Nunes-Pereira |
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| Přispěvatelé: | Universidade do Minho |
| Jazyk: | angličtina |
| Rok vydání: | 2009 |
| Předmět: |
Materials science
Light Mean free path Mie scattering FOS: Physical sciences Coherent backscattering 01 natural sciences Molecular physics Light scattering 010309 optics Matrix (mathematics) 0103 physical sciences Scattering Radiation Computer Simulation 010306 general physics Random laser Science & Technology Scattering Microspheres Atomic and Molecular Physics and Optics Refractometry Models Chemical Polystyrenes Gels Refractive index Optics (physics.optics) Physics - Optics |
| Zdroj: | Repositório Científico de Acesso Aberto de Portugal Repositório Científico de Acesso Aberto de Portugal (RCAAP) instacron:RCAAP |
| Popis: | 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 backscatte- ring measurements show that a range of transport mean free paths from 90 to 600 um 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. Fundação para a Ciência e a Tecnologia (FCT) - bolsa SFRH/BPD/23885/2005, PTDC/FIS/68419/2006 |
| Databáze: | OpenAIRE |
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