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Crystals 2017, 7(4), 104;

Structure and Optical Properties of K0.67Rb1.33Al2B2O7 Crystal

Beijing Center for Crystal Research and Development, Key Laboratory of Functional Crystals and Laser Technology, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, China
University of the Chinese Academy of Sciences, Beijing 100049, China
Author to whom correspondence should be addressed.
Academic Editors: Ning Ye and Rukang Li
Received: 20 January 2017 / Revised: 23 March 2017 / Accepted: 4 April 2017 / Published: 7 April 2017
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A UV nonlinear optical (NLO) crystal K0.67Rb1.33Al2B2O7 (KRABO) has been obtained by the top-seeded solution growth method for the first time. Its structure is formed of coplanar [BO3]3− triangle groups and [Al2O7]8− groups, which are built from two [AlO4]5− tetrahedra sharing one vertex. Rb and K atoms have the same coordinates and locate between each layer in a disorderly fashion. The crystal has a larger NLO effect compared with its analog K2Al2B2O7 (KABO), as evidenced by powder second harmonic generation (SHG) test. The shortest SHG phase-matching wavelength is down to 231 nm according to the first-principle calculation, which indicates that KRABO is possible for the fourth harmonic generation of Nd:YAG at 266 nm. View Full-Text
Keywords: chloride borates; nonlinear optical crystal; crystal growth chloride borates; nonlinear optical crystal; crystal growth

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Huang, Q.; Liu, L.; Xia, M.; Yang, Y.; Guo, S.; Wang, X.; Lin, Z.; Chen, C. Structure and Optical Properties of K0.67Rb1.33Al2B2O7 Crystal. Crystals 2017, 7, 104.

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