Photothermally-realized chalcogenide bulk GRIN media

Anna Zachariou; Ilya Mingareev; Thomas J. Loretz; Rashi Sharma; Justin Cook; Cesar Blanco; Martin C. Richardson; Myungkoo Kang; Kathleen A. Richardson

doi:10.1117/12.2663587

13 June 2023 Photothermally-realized chalcogenide bulk GRIN media

Anna Zachariou, Ilya Mingareev, Thomas J. Loretz, Rashi Sharma, Justin Cook, Cesar Blanco, Martin C. Richardson, Myungkoo Kang, Kathleen A. Richardson

Author Affiliations +

Proceedings Volume 12518, Window and Dome Technologies and Materials XVII ; 1251802 (2023) https://doi.org/10.1117/12.2663587
Event: SPIE Defense + Commercial Sensing, 2023, Orlando, Florida, United States

Abstract

We present a scalable approach capable of manufacturing high-precision three-dimensional (3-D) GRIN nanocomposites based on multi-component bulk glass-ceramics where we spatially modulate the concentration of high refractive index nanocrystals within a glass matrix. Previously demonstrated in homogeneous thin films and bulk glasses containing large scale liquid-liquid phase separation, this work expands on our efforts to optimize processing protocols employing a near single-phase bulk glass starting material enabling true 3-D modification. Sub-bandgap laser exposure generates Pb-rich amorphous phases within a Ge-As-Pb-Se glass matrix, which undergo crystallization resulting in the formation of highindex nanocrystals upon controlled heat treatment. Nanocrystal density is modulated in both radial and axial geometries by the laser dose, providing spatially tailorable changes in index and dispersion.

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Anna Zachariou, Ilya Mingareev, Thomas J. Loretz, Rashi Sharma, Justin Cook, Cesar Blanco, Martin C. Richardson, Myungkoo Kang, and Kathleen A. Richardson "Photothermally-realized chalcogenide bulk GRIN media", Proc. SPIE 12518, Window and Dome Technologies and Materials XVII , 1251802 (13 June 2023); https://doi.org/10.1117/12.2663587

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