期刊
OPTICAL MATERIALS EXPRESS
卷 10, 期 4, 页码 860-867出版社
OPTICAL SOC AMER
DOI: 10.1364/OME.383868
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资金
- DGA [ANR-18-ASTR-0014]
- Agence Nationale de la Recherche (ANR) [ANR-18-ASTR-0014] Funding Source: Agence Nationale de la Recherche (ANR)
While widely used in the visible, radial gradient refractive index (GRIN) lenses are still elusive in the IR waveband. In this paper we introduce a new method based on spatially resolved crystallization of chalcogenide glass to produce such lenses. Optical and structural properties of 80 GeSe2-20 Ga2Se3 glass ceramic samples are measured. A shift of refractive index is induced by increasing the density of nanocrystals. By placing the sample into a tailored thermal profile, spatially controlled crystallization is achieved. To our knowledge this constitutes the first fabrication of an optically functional radial GRIN in the IR. We also introduce a method to characterize the index profile non-destructively, which is a necessary step for embedding GRIN into commercial systems. (C) 2020 Optical Society of America under the terms of the OSA Open Access Publishing Agreement
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