LiNa5Mo9O30: Crystal Growth, Linear, and Nonlinear Optical Properties

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• 作者：Weiguo Zhang ; Hongwei Yu ; Jacqueline Cantwell ; Hongping Wu ; Kenneth R. Poeppelmeier ; P. Shiv Halasyamani
• 刊名：Chemistry of Materials
• 出版年：2016
• 出版时间：June 28, 2016
• 年：2016
• 卷：28
• 期：12
• 页码：4483-4491
• 全文大小：556K
• 年卷期：0
• ISSN：1520-5002

文摘

We report on the crystal growth, linear, and nonlinear optical properties of LiNa₅Mo₉O₃₀. The refractive indices were measured, and a very large birefringence of 0.2545 at 450.2 nm was determined. In addition, calculated phase-matching curves indicate that LiNa₅Mo₉O₃₀ can achieve noncritical type I and type II phase-matching (NCPM) for incident 1064 nm radiation. Maker fringe measurements, to determine individual nonlinear optical coefficients, were also performed on the crystals resulting in d₃₁ = 1.4 pm/V, d₃₂ = 4.3 pm/V, and d₃₃ = 1.1 pm/V. The laser damage threshold (LDT) is around 1.2 GW/cm² at 1064 nm using a 6 ns Nd:YAG laser operating at 5 Hz. The quality of the crystals was measured by high resolution X-ray diffraction rocking curve measurements that revealed a full width at half-maximum (fwhm) of 59″ from the (001) reflection. The absorption edge was determined to be 357 nm, with transmission up to 5.26 μm. Our results indicate that single crystal LiNa₅Mo₉O₃₀ is an excellent polarizer as well as second-order nonlinear optical material.