Title
Direct femtosecond laser writing of waveguides in As2S3 thin films
Abbreviated Journal Title
Opt. Lett.
Keywords
CHALCOGENIDE GLASSES; 2-PHOTON ABSORPTION; STRUCTURAL-CHANGES; PULSES; FABRICATION; GRATINGS; SILICA; Optics
Abstract
Single-channel waveguides and Y couplers were fabricated in chatcogenide thin films by use of femtosecond laser pulses from a 25-MHz repetition rate Ti:sapphire laser. Refractive-index differentials (Deltan > 10(-2)) were measured through interferometrie microscopy and are higher than the typical values reported for oxide glasses. The dependence of the index differential on the peak intensity reveals the nonlinear nature of the photosensitivity in arsenic trisulfide below its bandgap energy, and the refractive-index change is correlated to the photoinduced structural changes inferred by Raman spectroscopy data. A free-electron model to predict the parametric dependence of An is proposed. (C) 2004 Optical Society of America.
Journal Title
Optics Letters
Volume
29
Issue/Number
7
Publication Date
1-1-2004
Document Type
Article
Language
English
First Page
748
Last Page
750
WOS Identifier
ISSN
0146-9592
Recommended Citation
"Direct femtosecond laser writing of waveguides in As2S3 thin films" (2004). Faculty Bibliography 2000s. 4927.
https://stars.library.ucf.edu/facultybib2000/4927
Comments
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