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Giant Optical Activity and Second Harmonic Generation in 2D Hybrid Copper Halides
Author(s) -
Guo Zhihang,
Li Junzi,
Wang Changshun,
Liu Rulin,
Liang Jiechun,
Gao Yang,
Cheng Jiaji,
Zhang Wenjing,
Zhu Xi,
Pan Ruikun,
He Tingchao
Publication year - 2021
Publication title -
angewandte chemie
Language(s) - English
Resource type - Journals
eISSN - 1521-3757
pISSN - 0044-8249
DOI - 10.1002/ange.202015445
Subject(s) - halide , metal halides , copper , second harmonic generation , materials science , photonics , anisotropy , density functional theory , hybrid material , molecule , optoelectronics , metal , nanotechnology , chemistry , inorganic chemistry , optics , computational chemistry , organic chemistry , physics , metallurgy , laser
Abstract Hybrid organic–inorganic metal halides have emerged as highly promising materials for a wide range of applications in optoelectronics. Incorporating chiral organic molecules into metal halides enables the extension of their unique optical and electronic properties to chiral optics. By using chiral ( R )‐ or ( S )‐methylbenzylamine (R‐/S‐MBA) as the organic component, we synthesized chiral hybrid copper halides, (R‐/S‐MBA) 2 CuCl 4 , and investigated their optical activity. Thin films of this material showed a record anisotropic g‐factor as high as approximately 0.06. We discuss the origin of the giant optical activity observed in (R‐/S‐MBA) 2 CuCl 4 by theoretical modeling based on density functional theory (DFT) and demonstrate highly efficient second harmonic generation (SHG) in these samples. Our study provides insight into the design of chiral materials by structural engineering, creating a new platform for chiral and nonlinear photonic device applications of the chiral hybrid copper halides.