Synthesis and characterization of semi-organic nonlinear optical material: Sodium para-nitrophenolate para-nitrophenol dihydrate

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• 作者：S. Selvakumar ; A. Leo Rajesh ; ^{leorajesh@gmail.com" class="auth_mail" title="E-mail the corresponding author}
• 关键词：Solution growth ; Semi-organic ; Dielectric constant ; Optical properties ; Z-scan
• 刊名：Optik - International Journal for Light and Electron Optics
• 出版年：2016
• 出版时间：September 2016
• 年：2016
• 卷：127
• 期：17
• 页码：6982-6990
• 全文大小：1315 K

文摘

Single crystal of sodium para-nitrophenolate para-nitrophenol dihydrate (SPPD) was grown using slow evaporation solution growth technique with the crystal dimensions of 17 mm × 11 mm × 6 mm. The structure of the SPPD crystal was examined by X-ray diffraction analysis and the functional groups, hydrogen bonding interactions were identified using FT-IR and FT-Raman spectra. The UV–vis-NIR absorption spectrum revealed that the UV lower cut-off wavelength was 260 nm and the optical band gap of the crystal was 4.76 eV. The material was thermally stable up to 128 °C as determined by the TG-DTA curves. The mechanical behavior of the grown crystal was studied using Vickers microhardness. Dielectric constant and dielectric loss were also measured as a function of frequency between 5 Hz and 5 MHz and temperature between 40 and 100 °C, respectively. The second-harmonic generation efficiency was found to be five times greater than that of KDP. The third-order nonlinear parameters such as nonlinear refractive index (n₂), nonlinear absorption coefficient (β) and third-order susceptibility |χ(3)|$\left|{\chi }^{(3)}\right|$ were calculated using Z-scan technique.