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首页> 外文期刊>Physica, B. Condensed Matter >Growth and characterization of an efficient new NLO single crystal L-phenylalanine D-methionine for frequency conversion and optoelectronic applications
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Growth and characterization of an efficient new NLO single crystal L-phenylalanine D-methionine for frequency conversion and optoelectronic applications

机译：高效新型NLO单晶L-苯基丙氨酸的生长和表征用于变频和光电应用

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摘要

Optically active single crystals of L-phenylalanine D-methionine (LPDM) were grown by slow evaporation technique by co-crystallization of amino acids L-phenylalanine and D-methionine in water. The unit cell dimensions have been identified from single crystal X-ray diffraction technique. The existences of various hydrocarbyls were examined by FTIR and FT-Raman spectroscopy. The carbon and hydrogen environment of the grown crystals were analyzed by FT NMR spectrum. The optical absorption studies show that the crystal is transparent in the visible region with a lower cut-off wavelength of 259 nm and there by optical band gap energy E-g is calculated to be 5.35 eV. The Urbach energy, extinction coefficient, reflectance were calculated from UV-absorption data. Further, the thermal stability and accurate melting point has been investigated by TG/DSC techniques. The Kurtz powder SHG was confirmed using Nd: YAG laser with fundamental wavelength of 1064 nm. The dielectric behavior of the specimen has been determined for various temperatures (313 K, 333 K, 353 K, 373 K) at different frequencies. Fluorescence study and the time resolved decay calculation was also performed for the LPDM crystal. Optical nonlinear susceptibility was measured in LPDM and the real and imaginary part of chi(3) was evaluated by Z-scan technique using open and closed apertures.
机译：通过在水中的氨基酸L-苯丙氨酸和D-甲硫氨酸的共结晶，通过缓慢蒸发技术生长L-苯丙氨酸D-蛋氨酸（LPDM）的光学活性单晶。已经从单晶X射线衍射技术识别单元电池尺寸。通过FTIR和FT-拉曼光谱检查各种烃基的存在。通过FT NMR光谱分析生长晶体的碳和氢气环境。光学吸收研究表明，晶体在具有259nm的下切断波长的可见区域中是透明的，并且通过光带间隙能量E-G计算为5.35eV。 UV吸收数据计算URBACH能量，消光系数，反射率。此外，通过TG / DSC技术研究了热稳定性和精确的熔点。使用ND：YAG激光器的基本波长为1064nm，确认Kurtz粉末SHG。已经确定样品的介电行为在不同频率下针对各种温度（313k，333k，353k，373k）确定。还对LPDM晶体进行荧光研究和分辨的衰减计算。在LPDM中测量光学非线性敏感性，并且通过Z扫描技术评估了CHI（3）的真实和虚部，使用开口和封闭的孔评估。

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