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Updated: Feb 27, 2026

07:45
Quasi-light Storage for Optical Data Packets
Published on: February 6, 2014
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Exceptional bi-step switching of quadratic nonlinear optical properties in a one-dimensional channel compound
Sijie Liu1, Zhihua Sun, Chengmin Ji
1State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou 350002, P. R. China. jhluo@fjirsm.ac.cn sunzhihua@fjirsm.ac.cn.
Abstract:
We report a new solid-state nonlinear optical switch based on a one-dimensional channel compound NH4[(CH3)4N]SO4·H2O. It shows an exceptional bi-step switching of second harmonic generation (SHG) effects, corresponding to its SHG-Off, SHG-Low and SHG-High states, which originate from two-step structural transitions with unique centrosymmetric-polar-chiral symmetry transformations.

