Large nonlinear optical effect in tungsten bronze structures via Li/Na cross-substitutions

Shihang Chu; Kun Lin; Tao Yang; Chengyi Yu; Yili Cao; Yujuan Zhang; Yujiao Sun; Zerui Li; Xingxing Jiang; Zheshuai Lin; Qiang Li; Jun Chen; Kenichi Kato; Hui Wu; Qingzhen Huang; Xianran Xing

doi:10.1039/d0cc03479g

Large nonlinear optical effect in tungsten bronze structures via Li/Na cross-substitutions

Chem Commun (Camb). 2020 Jul 28;56(60):8384-8387. doi: 10.1039/d0cc03479g.

Authors

Shihang Chu¹, Kun Lin¹, Tao Yang¹, Chengyi Yu¹, Yili Cao¹, Yujuan Zhang¹, Yujiao Sun¹, Zerui Li¹, Xingxing Jiang², Zheshuai Lin², Qiang Li¹, Jun Chen¹, Kenichi Kato², Hui Wu³, Qingzhen Huang³, Xianran Xing¹

Affiliations

¹ Beijing Advanced Innovation Center for Materials Genome Engineering, Institute of Solid State Chemistry, Department of Physical Chemistry, University of Science and Technology Beijing, Beijing 100083, China. kunlin@ustb.edu.cn xing@ustb.edu.cn.
² Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, China.
³ Center for Neutron Research, National Institute of Standards and Technology, Gaithersburg, Maryland 20899-6102, USA.

PMID: 32573572
DOI: 10.1039/d0cc03479g

Abstract

By a simple cross-substitution of A-site Li/Na in tetragonal tungsten bronze (TTB) structures, we successfully synthesized a new niobate compound, Pb2.15(Li0.25Na0.75)0.7Nb5O15, with a superstructure. This compound exhibits a strong second harmonic generation (SHG) up to ∼47 × KDP. The large SHG response is related to strengthened local distortion, manifesting cross-substitution as a possibly general route to improve the NLO effect in stiff and low symmetric structures.