Optical, Dielectric and SHG measurement of semiorganic NLO single crystals: Triglycine Sodium halides
- PDF / 2,511,697 Bytes
- 6 Pages / 612 x 792 pts (letter) Page_size
- 53 Downloads / 188 Views
Optical, Dielectric and SHG measurement of semiorganic NLO single crystals: Triglycine Sodium halides Dr.R.Ananad kumari Sree Siddaganga College of Arts, Science and Commerce for Women, Tumkur, Karnataka, India [email protected]
ABSTRACT Single crystals of semiorganic nonlinear optical material Triglycine Sodium Halides(TGSH) have been grown from aqueous solution by slow evaporation technique at constant temperature. The powder X-ray diffraction of the grown crystals is recorded and indexed. Functional groups present in the samples are identified by FTIR spectral analysis. The optical absorption studies shows that the UV cut off wavelength is around 300nm and has a wide transparency window. The powder second harmonic generation efficiency of the crystals is measured by Kurtz and Perry powder technique using Nd:YAG laser and it is 1.5 times for Triglycine Sodium Chloride, 1.2 times for Triglycine Sodium Bromide and 1.4 times for Triglycine potassium Iodide crystals that of the standard KDP crystals. Triglycine Sodium halide crystals show very good stability under laser irradiation with no signs of decomposition. Laser damage threshold energy density of Triglycine Sodium Iodide is found to be 857 MW/cm2 and 540MW/cm2 for Triglycine Sodium Chloride crystals. INTRODUCTION Nonlinear optics has emerged as one of the most attractive fields of current research in view of its vital applications in areas such as optical modulation, optical switching, optical logic, frequency shifting and optical data storage for the developing technologies on telecommunications and signal processing [1,2]. Optical nonlinearity of the crystals with O-H bond has been extensively studied [3-7]. Investigations were initially focused on purely inorganic materials which were the first to demonstrate second order non linear optical properties [8]. Attention was later directed towards organic materials due to their low cost, fast and large nonlinear response over a broad frequency range, inherent synthetic, flexibility, high optical damage threshold and intrinsic tailorability [9]. In recent years, much attention has been paid to the research of novel nonlinear optical [NLO] materials, especially semiorganic crystals. In view of this single crystals of semiorganic Triglycine Sodium halides(TGSH) have been studied. Growth and characterization of Triglycine sodium Chloride,(TGSC), Triglycine Sodium Bromide(TGSB) and Triglycine sodium Iodide(TGSI) have been discussed. CRYSTAL GROWTH TriGlycine Sodium Chloride(TGSC), Triglycine Sodium Bromide(TGSB) and Triglycine Sodium Iodide(TGSI) were synthesized by dissolving AR grade Glycine and Sodium halides (NaCl, NaBr & NaI) in the molar ratio of 3:1 in the tripled distilled water with continuous stirring of 4hours using magnetic stirrer. The complete dissolved solution was filtered using microfilter. The solution was allowed to evaporate at constant temperature of 35oC in the constant temperature bath. Transparent good quality crystals were grown in 40 days. The
elemental analyses of the grown
Data Loading...
