Scattering of second-harmonic light from small spherical particles ordered in a crystalline lattice
Martorell, Jordi (Universitat Politècnica de Catalunya. Departament de Física i Enginyeria Nuclear)
Corbalán, R. (Ramón) (Universitat Autònoma de Barcelona. Departament de Física)
Vilaseca, Ramon (Universitat Politècnica de Catalunya. Departament de Física i Enginyeria Nuclear)
American Physical Society

Date:	1997
Abstract:	Experimental evidence of scattering of second-harmonic light from the surface of spherical particles of optical dimensions is presented. This mechanism for second-harmonic generation is observed in a suspension of monodisperse spherical colloidal particles, ordered in a centrosymmetric crystalline lattice. In this periodic structure the mechanism of phase matching is provided by the bending of the photon dispersion curve near the Bragg reflection band. A simple theoretical analysis based on the Rayleigh-Gans scattering approximation shows that constructive interference of the second-harmonic light scattered from different portions of a single-sphere surface leads to a nonvanishing field with a quadrupolar distribution intensity pattern.
Rights:	Tots els drets reservats.
Language:	Anglès
Document:	Article ; recerca ; Versió publicada
Published in:	Physical review. A, Vol. 55, Issue 6 (June 1997) , p. 4520-4525, ISSN 1050-2947

DOI: 10.1103/PhysRevA.55.4520

6 p, 120.7 KB

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