Volume 19, Issue 39 2302797
Research Article

Cd2Nb2Te4O15: A Novel Pseudo-Aurivillius-Type Tellurite with Unprecedented Nonlinear Optical Properties and Excellent Stability

Qiang Wang

Qiang Wang

College of Chemistry and Materials Science, Sichuan Normal University, Chengdu, 610066 P. R. China

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Xue-Hua Dong

Xue-Hua Dong

College of Chemistry and Materials Science, Sichuan Normal University, Chengdu, 610066 P. R. China

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Ling Huang

Ling Huang

College of Chemistry and Materials Science, Sichuan Normal University, Chengdu, 610066 P. R. China

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Kang-Min Ok

Kang-Min Ok

Department of Chemistry, Sogang University, Seoul, 04107 South Korea

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Zhi-En Lin

Zhi-En Lin

College of Chemistry, Sichuan University, Chengdu, 610065 P. R. China

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Guo-Hong Zou

Corresponding Author

Guo-Hong Zou

College of Chemistry, Sichuan University, Chengdu, 610065 P. R. China

E-mail: [email protected]

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First published: 28 May 2023
Citations: 6

Abstract

Oxides are emerging candidates for mid-infrared (mid-IR) nonlinear optical (NLO) materials. However, their intrinsically weak second harmonic generation (SHG) effects hinder their further development. A major design challenge is to increase the nonlinear coefficient while maintaining the broad mid-IR transmission and high laser-induced damage threshold (LIDT) of the oxides. In this study, it is reported on a polar NLO tellurite, Cd2Nb2Te4O15 (CNTO), featuring a pseudo-Aurivillius-type perovskite layered structure composed of three types of NLO active groups, including CdO6 octahedra, NbO6 octahedra, and TeO4 seesaws. The uniform orientation of the distorted units induces a giant SHG response that is ≈31 times larger than that of KH2PO4, the largest value among all reported metal tellurites. Additionally, CNTO exhibits a large band gap (3.75 eV), a wide optical transparency window (0.33–14.5 µm), superior birefringence (0.12@ 546 nm), high LIDT (23 × AgGaS2), and strong acid and alkali resistance, indicating its potential as a promising mid-IR NLO material.

Conflict of Interest

The authors declare no conflict of interest.

Data Availability Statement

The data that support the findings of this study are available from the corresponding author upon reasonable request.

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