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Optical studies on pure and aminoacids doped KDP crystal

P. KUMARESAN1,2, S. MOORTHY BABU1,* , P. M. ANBARASAN3

Affiliation

  1. Crystal Growth Centre, Anna University, Chennai – 600 025, India
  2. Department of Physics, Adhiparasakthi Engineering College, Melmaruvathur-603 319, India
  3. Department of Physics, Periyar University, Salem, 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 UV - VIS, FT-IR studies, SHG trace elements and dielectric 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. TGA-DTA studies reveal good thermal stability. The dopants increase the hardness value of the material. Aminoacids doping improves the NLO properties. The detailed results on the spectral parameters, habit modifications and other properties are presented..

Keywords

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

Submitted at: March 25, 2007
Accepted at: Sept. 18, 2007

Citation

P. KUMARESAN, S. MOORTHY BABU, P. M. ANBARASAN, Optical studies on pure and aminoacids doped KDP crystal, Journal of Optoelectronics and Advanced Materials Vol. 9, Iss. 9, pp. 2780-2786 (2007)