Effect of IR femtosecond laser irradiation on the structure of new sulfo-selenide glasses
Abbreviated Journal Title
germanium-based sulfide glass; Raman spectroscopy; femtosecond laser; irradiation; photo-expansion; photo-sensitivity; GE-SB-S; CHALCOGENIDE GLASSES; WAVE-GUIDES; OPTICAL-PROPERTIES; RAMAN-SPECTRA; SYSTEM; FABRICATION; GRATINGS; PULSES; SILICA; Materials Science, Multidisciplinary; Optics
We report results of a systematic study to evaluate for the first time, the relationship between compositional variation and photosensitivity of new glasses in the Ge-Sb-S/Se system with varying ratios of chalcogen (S/Se), upon IR femstosecond laser exposure. It is shown that the photo-sensitivity of the glass depends on the glass composition and that IR femtosecond laser irradiation in this system results in near-surface photo-expansion. Glass structure modification as a function of S/Se ratio and the influence of laser dose has been characterized using micro-Raman spectroscopy and is correlated to the resulting photo-expansion. As compared to other widely studied binary chalcogenide glass systems, photo-expansion was found to vary with the Se content. Such modification opens the pathway towards the laser writing of photonic devices in the surface of the material. (c) 2006 Elsevier B.V. All rights reserved.
"Effect of IR femtosecond laser irradiation on the structure of new sulfo-selenide glasses" (2007). Faculty Bibliography 2000s. 7524.