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†

Shihang Chu,^a Kun Lin,

*^a Tao Yang,^a Chengyi Yu,^a Yili Cao,^a Yujuan Zhang,^a Yujiao Sun,^a Zerui Li,^a Xingxing Jiang,^b Zheshuai Lin,

^b Qiang Li,^a Jun Chen,

^a Kenichi Kato,^b Hui Wu,

^c Qingzhen Huang^c and Xianran Xing

*^a

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* Corresponding authors

^a 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
E-mail: kunlin@ustb.edu.cn, xing@ustb.edu.cn

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

^c Center for Neutron Research, National Institute of Standards and Technology, Gaithersburg, Maryland 20899-6102, USA

Abstract

By a simple cross-substitution of A-site Li/Na in tetragonal tungsten bronze (TTB) structures, we successfully synthesized a new niobate compound, Pb_2.15(Li_0.25Na_0.75)_0.7Nb₅O₁₅, with a Image ID:d0cc03479g-t1.gif 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.

Chemical Communications

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

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

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