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Proceedings Paper

Scalable laser-written Ge-As-Pb-Se chalcogenide glass-ceramic films and the realization of infrared gradient refractive index elements
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Paper Abstract

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.

Paper Details

Date Published: 14 May 2019
PDF: 13 pages
Proc. SPIE 10998, Advanced Optics for Imaging Applications: UV through LWIR IV, 109980E (14 May 2019); doi: 10.1117/12.2518771
Show Author Affiliations
Myungkoo Kang, CREOL, The College of Optics and Photonics, Univ. of Central Florida (United States)
Teodor Malendevych, CREOL, The College of Optics and Photonics, Univ. of Central Florida (United States)
Gufan Yin, Massachusetts Institute of Technology (United States)
Ian B. Murray, BAE Systems (United States)
Martin C. Richardson, CREOL, The College of Optics and Photonics, Univ. of Central Florida (United States)
Juejun Hu, Massachusetts Institute of Technology (United States)
Ilya Mingareev, Florida Institute of Technology (United States)
Kathleen A. Richardson, CREOL, The College of Optics and Photonics, Univ. of Central Florida (United States)


Published in SPIE Proceedings Vol. 10998:
Advanced Optics for Imaging Applications: UV through LWIR IV
Jay N. Vizgaitis; Peter L. Marasco; Jasbinder S. Sanghera, Editor(s)

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