Scalable laser-written Ge-As-Pb-Se chalcogenide glass-ceramic films and the realization of infrared gradient refractive index elements
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109980E.pdf
Description
Published version
Size
1.16 MB
Format
Adobe PDF
Checksum (MD5)
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Author(s)
Kang, Myungkoo
Malendevych, Teodor
Yin, Gufan
Murray, Ian B.
Richardson, Martin C.
Hu, Juejun
Mingareev, Ilya
Richardson, Kathleen
Date Issued
May 14, 2019
Journal
Proceedings of SPIE - The International Society for Optical Engineering
Publisher
SPIE
Citation
Kang, Myungkoo, Malendevych, Teodor, Yin, Gufan, Murray, Ian B., Richardson, Martin C. et al. 2019. "Scalable laser-written Ge-As-Pb-Se chalcogenide glass-ceramic films and the realization of infrared gradient refractive index elements." Proceedings of SPIE - The International Society for Optical Engineering, 10998.
Version
Final published version
Abstract
© 2019 SPIE. We demonstrate a scalable photo-thermal process which enables manufacturing of infrared (IR) transmissive glass-ceramic films with gradient refractive index (GRIN) profiles. Spatiallycontrolled laser irradiation creates Pb-rich amorphous phases within Ge-As-Pb-Se glass films, which are subsequently crystallized and become high index phases upon heat treatment. The density of the high index nanocrystals is shown to be controlled by the laser irradiation power, and the extent of fraction crystallized is controlled by post heat treatment time and temperature. Both of these variables can be optimized to realize a localized effective refractive index change, enabling a spatially-modulated refractive index change up to ∼ +0.1. We demonstrate IR GRIN functionality within 1 inch diameter GAP-Se films with thicknesses ranging from 1 to 40 μm, confirming the scalability of our photo-thermal process to component-relevant geometries.
MIT Department
Massachusetts Institute of Technology. Department of Materials Science and Engineering
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DOI of Published Version
https://doi.org/10.1117/12.2518771
