Issue 15, 2023

Modulating optical performance by phase transition in a nonlinear optical material β-Li2RbBi(PO4)2

Abstract

As nonlinear optical (NLO) materials, phosphates often suffer from weak second harmonic generation (SHG) response and low birefringence. Here, we report the successful synthesis of a new UV NLO orthophosphate, β-Li2RbBi(PO4)2, by the high temperature solution method, and demonstrate that it crystallizes in a polar space group of P21 and is composed of 1D 1[Bi4(PO4)8] infinite chains that are constructed from 1[Bi2O11] chains and [PO4] clusters. The optical functional motifs 1[Bi4(PO4)8] are arranged in a parallel mode, which greatly improves the polarizability of the phosphate. As a result, β-Li2RbBi(PO4)2 presents the largest SHG response, 5.2 × KH2PO4 (KDP), at 1064 nm incident radiation among all the Bi-based phosphates. Furthermore, first-principles calculations reveal that the synergistic effect of P–O and Bi–O groups contributes significantly to the optical properties of the title compound.

Graphical abstract: Modulating optical performance by phase transition in a nonlinear optical material β-Li2RbBi(PO4)2

Supplementary files

Article information

Article type
Research Article
Submitted
04 Mai 2023
Accepted
18 Jun 2023
First published
27 Jun 2023

Inorg. Chem. Front., 2023,10, 4496-4502

Modulating optical performance by phase transition in a nonlinear optical material β-Li2RbBi(PO4)2

L. Wu, R. Zhang, Q. Jing, H. Huang, X. He, Z. Wang and Z. Chen, Inorg. Chem. Front., 2023, 10, 4496 DOI: 10.1039/D3QI00828B

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