Issue 22, 2023

LiVTeO5: a mid-infrared nonlinear optical vanadium tellurate crystal exhibiting enhanced second harmonic generation activities and notable birefringence

Abstract

Mid-infrared (IR) nonlinear optical (NLO) crystals are of great interest for applications in laser science and technology. Nevertheless, the pursuit of mid-IR NLO crystals displaying exceptional comprehensive performance remains a challenge. Herein, an effective strategy is achieved by combining two distinct species of second-order Jahn–Teller distorted cations, Te4+ and V5+, into one compound. A prospective NLO vanadium tellurate crystal, LiVTeO5, was synthesized via spontaneous crystallization, which crystallizes in the orthorhombic space group P212121 (no. 19) with a three-dimensional framework structure. The optical measurements revealed that LiVTeO5 manifests a large band gap of 3.2 eV and an intense second-harmonic-generation (SHG) activity of 3.2 × KDP. Moreover, it displays an extensive transmittance region beyond 5.0 μm, along with a discernible birefringence of 0.091, thereby facilitating the realization of the phase matching conditions. Additionally, structural analysis combined with first-principles calculations elucidate that the [TeO3] and [VO5] active building blocks primarily contribute to the intriguing macroscopic nonlinearity and notable birefringence observed in LiVTeO5. These findings highlight the optimized overall properties of LiVTeO5, which makes it a potential mid-IR NLO material.

Graphical abstract: LiVTeO5: a mid-infrared nonlinear optical vanadium tellurate crystal exhibiting enhanced second harmonic generation activities and notable birefringence

Supplementary files

Article information

Article type
Research Article
Submitted
26 août 2023
Accepted
19 sept. 2023
First published
19 sept. 2023

Inorg. Chem. Front., 2023,10, 6557-6565

LiVTeO5: a mid-infrared nonlinear optical vanadium tellurate crystal exhibiting enhanced second harmonic generation activities and notable birefringence

Y. She, J. Jiao, Z. Wang, J. Chai, S. Jie, N. Ye, Z. Hu, Y. Wu and C. Li, Inorg. Chem. Front., 2023, 10, 6557 DOI: 10.1039/D3QI01715J

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