Experimental observation of second-harmonic generation and diffusion inside random media

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dc.creatorFaez, Sanli
dc.creatorJohnson, P. M.
dc.creatorMazurenko, D. A.
dc.creatorLagendijk, Ad
dc.date2009-02-06
dc.date.accessioned2026-07-07T12:38:55Z
dc.date.available2026-07-07T12:38:55Z
dc.descriptionWe have experimentally measured the distribution of the second-harmonic intensity that is generated inside a highly-scattering slab of porous gallium phosphide. Two complementary techniques for determining the distribution are used. First, the spatial distribution of second-harmonic light intensity at the side of a cleaved slab has been recorded. Second, the total second-harmonic radiation at each side of the slab has been measured for several samples at various wavelengths. By combining these measurements with a diffusion model for second-harmonic generation that incorporates extrapolated boundary conditions, we present a consistent picture of the distribution of the second-harmonic intensity inside the slab. We find that the ratio $\ell_{2ω}/L_c$ of the mean free path at the second-harmonic frequency to the coherence length, which was suggested by some earlier calculations, cannot describe the second-harmonic yield in our samples. For describing the total second-harmonic yield, our experiments show that the scattering parameter at the fundamental frequency $\k_{1ω}\ell_{1ω}$ is the most relevant parameter in our type of samples.
dc.description10 pages, 7 figures
dc.identifierhttps://arxiv.org/abs/0902.1093
dc.identifierhttp://arxiv.org/abs/0902.1093
dc.identifierJ. Opt. Soc. Am. B, vol. 26 no. 2, pp. 235-243 (2009)
dc.identifierdoi:10.1364/JOSAB.26.000235
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/218933
dc.subjectOptics
dc.titleExperimental observation of second-harmonic generation and diffusion inside random media
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