Volume 133, Issue 41 pp. 22621-22627
Forschungsartikel

A Congruent-Melting Mid-Infrared Nonlinear Optical Vanadate Exhibiting Strong Second-Harmonic Generation

Dr. Chao Wu

Dr. Chao Wu

China-Australia Joint Research Center for Functional Molecular Materials, School of Chemical Science and Engineering, Tongji University, Shanghai, 200092 China

These authors contributed equally to this work.

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Dr. Xingxing Jiang

Dr. Xingxing Jiang

Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing, 100190 China

These authors contributed equally to this work.

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Lin Lin

Lin Lin

China-Australia Joint Research Center for Functional Molecular Materials, School of Chemical Science and Engineering, Tongji University, Shanghai, 200092 China

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Yilei Hu

Yilei Hu

China-Australia Joint Research Center for Functional Molecular Materials, School of Chemical Science and Engineering, Tongji University, Shanghai, 200092 China

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Tianhui Wu

Tianhui Wu

China-Australia Joint Research Center for Functional Molecular Materials, School of Chemical Science and Engineering, Tongji University, Shanghai, 200092 China

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Prof. Zheshuai Lin

Prof. Zheshuai Lin

Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing, 100190 China

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Prof. Zhipeng Huang

Prof. Zhipeng Huang

China-Australia Joint Research Center for Functional Molecular Materials, School of Chemical Science and Engineering, Tongji University, Shanghai, 200092 China

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Prof. Mark G. Humphrey

Prof. Mark G. Humphrey

Research School of Chemistry, Australian National University, Canberra, ACT, 2601 Australia

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Prof. Chi Zhang

Corresponding Author

Prof. Chi Zhang

China-Australia Joint Research Center for Functional Molecular Materials, School of Chemical Science and Engineering, Tongji University, Shanghai, 200092 China

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First published: 04 August 2021
Citations: 6

Abstract

Study of mid-infrared (mid-IR) nonlinear optical (NLO) materials is hindered by the competing requirements of optimized second-harmonic generation (SHG) coefficient dij and laser-induced damage threshold (LIDT) as well as the harsh synthetic conditions. Herein, we report facile hydrothermal synthesis of a polar NLO vanadate Cs4V8O22 (CVO) featuring a quasi-rigid honeycomb-layered structure with [VO4] and [VO5] polyhedra aligned parallel. CVO possesses a wide IR-transparent window, high LIDT, and congruent-melting behavior. It has very strong phase-matchable SHG intensities in metal vanadate family (12.0 × KDP @ 1064 nm and 2.2 × AGS @ 2100 nm). First-principles calculations suggest that the exceptional SHG responses of CVO largely originate from virtual electronic transitions within [V4O11] layer; the excellent optical transmittance of CVO arises from the special characteristics of vibrational phonons resulting from the layered structure.

Conflict of interest

The authors declare no conflict of interest.

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