Advanced Optical Materials
Advanced Optical Materials
4 years ago

The Next-Generation of Nonlinear Optical Materials: Rb3Ba3Li2Al4B6O20F—Synthesis, Characterization, and Crystal Growth

The Next-Generation of Nonlinear Optical Materials: Rb3Ba3Li2Al4B6O20F—Synthesis, Characterization, and Crystal Growth
Hongping Wu, James M. Rondinelli, Shiv Halasyamani, Hongwei Yu, Joshua Young, Weiguo Zhang
Nonlinear optical (NLO) materials are of intense academic and technological interest attributable to their ability to generate coherent radiation over a range of different wavelengths. The requirements for a viable NLO material are rather strict, and their discovery has mainly been serendipitous. This study reports synthesis, characterization, and, most importantly, growth of large single crystals of a technologically viable NLO material—Rb3Ba3Li2Al4B6O20F. Through the judicious selection of cations, Rb3Ba3Li2Al4B6O20F exhibits a 3D structure that facilitates the growth of large single crystals along the optical axis direction. Measurements on these crystals indicate that Rb3Ba3Li2Al4B6O20F exhibits a moderate birefringence of 0.057 at 1064 nm enabling Type I phase-matching down to 243 nm. Theoretical calculations indicate the symmetry adapted mode displacement (SAMD) parameter scales with the second-harmonic generation intensity. A next-generation technologically viable nonlinear optical crystal, Rb3Ba3Li2Al4B6O20F, is successfully designed, synthesized, characterized, and grown. This crystal not only solves the layering issue observed in KBe2BO3F and Sr2Be2B2O7, which has hindered their crystal growth, but also does not require the use of toxic BeO in the synthesis. More importantly, it exhibits a moderate birefringence and is nonhygroscopic.

Publisher URL: http://onlinelibrary.wiley.com/resolve/doi

DOI: 10.1002/adom.201700840

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