| Autor: |
Zimnyakov DA; Optics Department, Saratov State University, Russia. zimnykov@squ.ru, Pravdin AB, Kuznetsova LV, Kochubey VI, Tuchin VV, Wang RK, Ushakova OV |
| Jazyk: |
angličtina |
| Zdroj: |
Journal of the Optical Society of America. A, Optics, image science, and vision [J Opt Soc Am A Opt Image Sci Vis] 2007 Mar; Vol. 24 (3), pp. 711-23. |
| DOI: |
10.1364/josaa.24.000711 |
| Abstrakt: |
The transport properties of dense random media such as rutile powder layers and polyball suspensions are analyzed in visible and near infrared on the basis of experimental data on coherent backscattering, diffuse transmittance, and low-coherence interferometry. The developed technique of retrieval of the transport parameters of examined scattering media allows the evaluation of the transport mean free path l* and the effective refractive index n(ef) of the medium without a priori knowledge of the optical properties of the scattering particles. It is found that with decreasing wavelength lambda(0) the value of localization parameter 2pin(ef)l*/lambda(0) of the studied rutile samples abruptly drops and approaches approximately 2.6 at 473 nm. This peculiarity is caused by the very large scattering efficiency of scatterers in the vicinity of the first Mie resonance. |
| Databáze: |
MEDLINE |
| Externí odkaz: |
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