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Effect of amino acids (L-Glutamic acid, L-Histidine, L-Valine) on the performance of KDP single crystals

P. KUMARESAN1,2, S. MOORTHY BABU1,*

Affiliation

  1. Crystal Growth Centre, Anna University, Chennai – 600 025, India
  2. Department of Physics, Adhiparasakthi Engineering College, Melmaruvathur-603 319, India

Abstract

Amino acids (L-Glutamic acid, L-Histidine, L-Valine)doped potassium dihydrogen phospate crystals are grown by solution growth technique. Slow cooling as well as slow evaporation methods were employed to grow these crystals .The concentration of dopants in the mother solution was varied from 0.1 mole% to 10 mole % .The solubility data for all dopants concentration were determined. There is variation in pH value and hence, there is habit modification of the grown crystals were characterized with XRD, UV - VIS, FT-IR studies, hardness, SHG trace elements and dielectric studies XRD studies reveal slight distortion of lattice parameter for the heavily doped KDP crystals. UV – Visible spectra confirm the improvement in the transparency of these crystals on doping metal ions. FT – IR spectra reveal strong absorption band between 1400 – 1600 cm-1 for metal ion doped crystals. The dopants increase the hardness value of the material and it also depends on the concentration of the dopants. Amino acids doping improved the NLO properties. The detailed results on the spectral parameters, habit modifications and constant values will be presented..

Keywords

Growth from solutions, Second Harmonic Generation, Nonlinear optical materials, Amino acids doped KDP.

Submitted at: Nov. 14, 2006
Accepted at: May 15, 2007

Citation

P. KUMARESAN, S. MOORTHY BABU, Effect of amino acids (L-Glutamic acid, L-Histidine, L-Valine) on the performance of KDP single crystals, Journal of Optoelectronics and Advanced Materials Vol. 9, Iss. 5, pp. 1299-1305 (2007)