Double fitting of Maker fringes to characterize near-surface and bulk second-order nonlinearities in poled silica
Qiu, Mingxin (Universitat Politècnica de Catalunya. Departament de Física i Enginyeria Nuclear)
Vilaseca, Ramon (Universitat Politècnica de Catalunya. Departament de Física i Enginyeria Nuclear)
Botey, Muriel (Universitat Politècnica de Catalunya. Departament de Física i Enginyeria Nuclear)
Sellarès, Jordi (Universitat Autònoma de Barcelona. Departament de Física)
Pi, F. (Pi i Vila, Francesc) (Universitat Autònoma de Barcelona. Departament de Física)
Orriols Tubella, Gaspar (Universitat Autònoma de Barcelona. Departament de Física)
American Physical Society

Date:	2000
Abstract:	An experimental analysis of the distribution and thickness of the bulk nonlinearity induced in poled silica is reported. The second-order susceptibility decreases exponentially from the anodic interface. Maker fringe patterns showing a double structure are interpreted in relation to the presence of two nonlinear profiles, one concentrated near the anodic surface and another extending into the bulk of the sample. The Maker fringe theory is properly generalized and a double fitting technique reproducing well the experimental results is used to characterize the induced nonlinearities. The dependence of the second-harmonic signal on the poling temperature is given, which is different from that of sol-gel silica.
Rights:	Tots els drets reservats.
Language:	Anglès
Document:	Article ; recerca ; Versió publicada
Subject:	Silica ; Surface patterning ; Fringe analysis ; Surface structure
Published in:	Applied physics letters, Vol. 76, Issue 23 (April 2000) , p. 3346-3348, ISSN 1077-3118

DOI: 10.1063/1.126643

4 p, 301.5 KB

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