Enhanced non-linear optical response in hybrid GSPN crystals: Structural, optical and dielectric analysis

详细信息    查看全文

• 作者：M.M. Khandpekar^a ; S.S. Dongare^a ; S.B. Patil^b ; ^{shirishpatil64@yahoo.com} ; S.P. Pati^c
• 关键词：Crystal growth ; Structure ; Optical ; SHG efficiency ; Hardness
• 刊名：Optics Communications
• 出版年：2011
• 出版时间：15 March 2011
• 年：2011
• 卷：284
• 期：6
• 页码：1583-1588
• 全文大小：857 K

文摘

Transparent and well defined crystals of GSPN series have been grown with alpha-glycine in simultaneous presence of two nitrates (NaNO₃ and KNO₃). Transparent and well defined crystals (22 mm × 13 mm × 5 mm) have been obtained in 3–4 weeks time by slow cooling. Addition of a strong acid (0.5 % HCl) during growth is seen to enhance solubility, SHG efficiency by 2.78 times, Meyer's hardness index by 1.7 times and M.P by 42 °C of that of GSPN crystals. The SHG efficiency of acid added-GSPN has been found to be more than that of KDP crystal. GSPN is found to crystallize in orthorhombic symmetry and the presence of chemical components/groups has been identified by CHNS, EDAX and NMR analysis. Comparative FTIR and Laser Raman analysis shows the presence of active peaks indicating the molecule with a lack of center of symmetry. The UV spectrum shows existence of wide transparency window suitable for optoelectronic applications with band gap energy of about 5.72 eV. The crystals exhibit linear I–V characteristic followed by switching at 41 V/cm. The dielectric loss was seen to decrease exponentially with applied frequency from 100 Hz to 1 MHz.