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Polarization-Dependent Photoinduced Surface Microgratings In Amorphous Chalcogenide Glasses
Authors
Tigran V. Galstian
Amy G. Graham
+3 more
Kathleen A. Richardson
Ali Saliminia
Alain Villeneuve
Publication date
1 December 2004
Publisher
'Information Bulletin on Variable Stars (IBVS)'
Abstract
Recently, the chalcogenide glasses (ChG) have attracted much attention in the field of optical communication and integrated optics. High transparency in the infrared spectral region, low phonon energy, high nonlinear properties, and high photosensitivity at near band-gap (Eg 2.35 eV, a 1-2 x iO cm1 at 5 14 nm) are important characteristics of these glasses. In particular, the photosensitive effects, among them photodarkening and giant photoexpansion (2-5%) [1], have been extensively studied and several holographic elements, such as microlenses, diffraction and Bragg gratings, and channel waveguides have been realized in fiber, bulk, and thin film forms of these materials [2-4]. In this work, we report for the first time to our knowledge, the observation and study of the strong polarization dependent photoinduced surface relief gratings in As2S3 thin films. A model to describe the observed phenomena is also presented. © 2000 SPIE
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Last time updated on 18/10/2022