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CaB5O7F3: A Beryllium-Free Alkaline-Earth Fluorooxoborate Exhibiting Excellent Nonlinear Optical Performances
Zhizhong Zhang1,2, Ying Wang1, Bingbing Zhang1
1CAS Key Laboratory of Functional Materials and Devices for Special Environments, Xinjiang Technical Institute of Physics & Chemistry , CAS; Xinjiang Key Laboratory of Electronic Information Materials and Devices , 40-1 South Beijing Road , Urumqi 830011 , China.
Abstract:
Noncentrosymmetric (NCS) fluorooxoborates are one of the most attractive systems for discovering the new deep-ultraviolet (DUV) nonlinear optical (NLO) materials. Here, we report the formation, crystal structure, and optical properties of a new NCS alkaline earth fluorooxoborate: CaB5O7F3. It exhibits excellent NLO performances including large band gap (8.75 eV), large second harmonic generation intensity (2 × KH2PO4 and 0.4 × β-BaB2O4, under 1064 and 532 nm radiation, respectively), and moderate birefringence (0.07 @ 1064 nm) that enables frequency doubling down to 183 nm. It demonstrates that CaB5O7F3 is a promising DUV NLO material.
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