Temperature dependent blue second harmonic generation in Ba₅Li₂Ti₂Nb₈O₃₀ microcrystals embedded in TeO₂ glass–matrix

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• 作者：M. Niyaz Ahamad ; A. Vasudevarao ; Venkatraman Gopalan ; Himanshu Jain ; K.B.R. Varma
• 关键词：Glass ceramics ; Optical microscopy ; Non-linear optics ; Tellurites
• 刊名：Journal of Non-Crystalline Solids
• 出版年：2009
• 出版时间：15 August 2009
• 年：2009
• 卷：355
• 期：28-30
• 页码：1517-1520
• 全文大小：381 K

文摘

The as-quenched samples in the system (100 − x) TeO₂-(x) Ba₅Li₂Ti₂Nb₈O₃₀ (2  x  8) were found to be embedded with 10–20 μm sized crystallites of the polar phase Ba₅Li₂Ti₂Nb₈O₃₀ (BLTN). Blue (400 nm) second harmonic generation (SHG) was observed in transmission mode when 800 nm laser light was allowed to pass through the individual crystallites. The blue SHG signal was temperature dependent and its intensity was maximum at 175 °C which was tentatively attributed to the concomitant changes associated with the refractive indices of the BLTN crystallites. The SHG intensity attained a minimum value around the Curie temperature of BLTN crystals.