Phys. Rev. A 77, 035803 (2008) [4 pages]Wavelength dependence of light diffusion in strongly scattering macroporous gallium phosphideReceived 31 July 2007; published 18 March 2008 We present time-resolved measurements of light transport through strongly scattering macroporous gallium phosphide at various vacuum wavelengths between 705 nm and 855 nm. Within this range the transport mean free path is strongly wavelength dependent, whereas the observed energy velocity is shown to be independent of the wavelength. We conclude that microscopic resonances, which can strongly slow down the diffusion process in, e.g., granular TiO2, are absent in macroporous gallium phosphide in the wavelength region of concern. © 2008 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevA.77.035803
DOI:
10.1103/PhysRevA.77.035803
PACS:
42.25.Dd, 05.60.−k, 61.43.Gt
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