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Rb7SrY2(B5O10)3: A Rare-Earth Pentaborate with Moderate Second-Harmonic Response and Interesting Phase-Matching
Yunfei Li1,2,3, Fei Liang1,3, Huimin Song1,2,3
1Center for Crystal Research and Development, Key Laboratory of Functional Crystals and Laser Technology of Chinese Academy of Sciences , Technical Institute of Physics and Chemistry, Chinese Academy of Sciences , Beijing 100190 , P. R. China.
Abstract:
Phase-matchable (PM) capacity is an indispensable factor in evaluating the applicable prospect of a new nonlinear optical crystal. Obtaining an accurate and credible PM curve by the Kurtz-Perry method using a small single crystal is indeed crucial. Here, we reported a new borate NLO crystal Rb7SrY2(B5O10)3 (I) and studied the influence of the arrangement of micro-[B5O10] groups on its birefringence. Interestingly, the synthesized polycrystalline powder and grinded single crystal display divergent PM and non-PM behavior, respectively. Combining theoretical calculations and analysis, I is demonstrated to be non-phase matchable for the second-harmonic generation (SHG) process of a 1064 nm laser.
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