Abstract
Good quality colourless transparent nonlinear optical single crystals of L-Isoluecinium phthalate (LIP) was grown successfully by slow evaporation solution growth method from aqua solution at room temperature. Single crystals of LIP of dimensions 15mm x 8mm x 5mm were harvested after 50 days. The lattice parameter of grown crystal was studied by single crystal X- ray diffraction analysis and it was confirmed that the grown crystals belong to monoclinic crystal system with noncentrosymmetric space group of C2. Fourier transform infrared spectroscopic (FT-IR) studies was carried out using Jasco FT/IR 6300 Fourier transform infrared spectrometer by ATR method in the range of 400 – 4000 cm-1and it has been used to confirm the vibrational frequencies of various functional groups present in the crystal. Laser induced damage threshold study was carried using Q-Switced Nd: YAG laser and the laser power with the threshold value of 0.323 GW/cm2 also calculated. The UV-Vis-NIR spectroscopic study confirms that the crystal has good optical transparency and the cut off wavelength was found to be 300 nm. The band gap of the grown crystal was determined from the Tauc plot. The nonlinear optical property was confirmed by Kurtz Perry powder technique and it was compared with the standard pure potassium dihydrogen phosphate (KDP) crystals. In addition, a photoluminescence analysis was carried out for LIP crystal
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