Radial gradient refractive index (GRIN) infrared lens based on spatially resolved crystallization of chalcogenide glass

被引：30

作者：

Lavanant, Enora ^{[1
,2
]}

Calvez, Laurent ^{[1
]}

Chevire, Francois ^{[1
]}

Roze, Mathieu ^{[2
]}

Hingant, Thomas ^{[2
]}

Proux, Raphael ^{[2
]}

Guimond, Yann ^{[2
]}

Zhang, Xiang-Hua ^{[1
]}

机构：

[1] Univ Rennes, CNRS, ISCR, UMR 6226, F-35000 Rennes, France

[2] ZA Boulais, Umicore IR Glass, F-35690 Acigne, France

来源：

OPTICAL MATERIALS EXPRESS | 2020年 / 10卷 / 04期

关键词：

ALKALI-HALIDE; CERAMICS;

D O I：

10.1364/OME.383868

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

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

引用

页码：860 / 867

页数：8

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