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Ba6In6Zn4Se19: a high performance infrared nonlinear optical crystal with [InSe3]3− trigonal planar functional motifs

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Abstract

An excellent nonlinear optical (NLO) material should satisfy many critical requirements simultaneously. How to balance all the requirements is a challenge, as they cause contradictory demands on structural attributes. Here, we use a high entropy strategy to integrate the advantages of ZnSe for a large NLO coefficient and a planar [InSe3]3− functional motif for phase matching. The resulting Ba6In6Zn4Se19 crystal shows excellent comprehensive NLO properties, i.e. a large effective NLO coefficient (2 × AgGaS2), a high laser induced damage threshold (LIDT, 15.5 × AgGaS2), a wide transmission range (0.52–22.5 μm), and an increased birefringence (Δn = 0.098) for phase matching. Theoretical calculations indicate that planar [InSe3]3− is an effective NLO functional motif for tuning birefringence and the “cocktail effect” realized via the high entropy strategy is important to improve the overall NLO performance. This study provides a promising way of developing new NLO materials with excellent comprehensive performance.

Graphical abstract: Ba6In6Zn4Se19: a high performance infrared nonlinear optical crystal with [InSe3]3− trigonal planar functional motifs

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Supplementary files

Article information


Submitted
12 Mar 2020
Accepted
28 Apr 2020
First published
01 May 2020

J. Mater. Chem. C, 2020, Advance Article
Article type
Paper

Ba6In6Zn4Se19: a high performance infrared nonlinear optical crystal with [InSe3]3− trigonal planar functional motifs

A. Zhou, C. Lin, B. Li, W. Cheng, Z. Guo, Z. Hou, F. Yuan and G. Chai, J. Mater. Chem. C, 2020, Advance Article , DOI: 10.1039/D0TC01282C

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