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Proceedings Paper

Measurement of phase and amplitude modulations in Sb-based films
Author(s): L. F. Avila; M. Nalin; Lucila Cescato
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Paper Abstract

In this work we studied the changes of the optical constants of films in the binary system Sb2O3-Sb2S3 induced by light in the VIS-UV. The measurements were performed before and after homogeneous irradiation of the films to a Hg lamp and in real time during the holographic exposure of the samples (at 458nm). Changes of the absorption coefficient (amplitude grating) and refractive index (phase grating) were measured simultaneously using the self-diffraction using the holographic setup. Besides the films presented a strong photodarkening effect under homogeneous irradiation, the samples holographically exposed presented only refractive index modulations. None amplitude modulation was measured in real time for spatial frequencies of about 1000 l/mm.

Paper Details

Date Published: 20 August 2009
PDF: 9 pages
Proc. SPIE 7404, Nanostructured Thin Films II, 74040W (20 August 2009); doi: 10.1117/12.825143
Show Author Affiliations
L. F. Avila, Univ. of Campinas (Brazil)
M. Nalin, São Paulo State Univ. (Brazil)
Lucila Cescato, Univ. of Campinas (Brazil)

Published in SPIE Proceedings Vol. 7404:
Nanostructured Thin Films II
Geoffrey B. Smith; Akhlesh Lakhtakia; Cheng-Chung Lee, Editor(s)

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