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P. KUMARESAN1,2, S. MOORTHY BABU1,* , P. M. ANBARASAN3
Potassium dihydrogen orthophosphate (KDP) single crystals doped with metal ions (Al3+, Na+) and amino acid (L-Arginine) have been grown by a solution growth technique. Slow evaporation and slow cooling 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 dopant concentrations were determined. Powder XRD studies revealed the distortion of lattice parameter values for the heavily doped KDP crystals. UV and visible spectra confirmed the improvement in the transparency of these crystals on doping with metal ions. FT – IR spectra revealed a strong absorption band between 1500 – 1700 cm-1 for metal ion doped crystals. The functional groups present in the grown crystals have been confirmed by FT-IR spectral analysis. The observed frequencies were assigned on the basis of symmetry operation on the molecule and normal coordinate analysis. The study not only confirmed the strong interaction of Al3+ and Na+ ions of the dopants with the –OH group of KDP but also the entry of these ions in the crystal lattice of tetragonal KDP crystal. The dopants increase the hardness value of the material, which also depends on the concentration of the dopants. Amino acid doping improves the NLO properties of the grown crystals. The growth kinetics of KDP crystals in the presence of impurities is discussed.
Growth from solutions, Single crystal growth, Nonlinear optical materials, KDP.
P. KUMARESAN, S. MOORTHY BABU, P. M. ANBARASAN, Effect of metal ion and amino acid doping on the optical performance of KDP single crystals, Optoelectronics and Advanced Materials - Rapid Communications, 1, 2, February 2007, pp.65-69 (2007).
Submitted at: Jan. 8, 2007
Accepted at: Jan. 15, 2007
Optoelectronics and Advanced Materials - Rapid Communications
(2024): Impact Factor = 0.4 - Journal Citation Reports (Clarivate Analytics, 2025)
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