The Effect of Cobalt Mixing on Pure Copper Mercury Thiocyanate Nonlinear Optical Crystal

B. Vijayabhaskaran, C.Ramachandra Raja

Department of Physics, A. A. M. Engineering College, Kovilvenni 614 403, India.
Department of Physics, Govt. Arts College (Autonomous), Kumbakonam 612 001, India.

DOI: 10.4236/jmmce.2012.117054                

Abstract

The nonlinear optical crystals of cobalt (Co²⁺) mixed copper mercury thiocyanate have been grown by slow evaporation method using water and ethanol as solvents. The grown crystals have been subjected to different characterization analyses and the results were compared with pure copper mercury thiocyanate crystal (CMTC), which has been already reported. The single crystal X-ray diffraction shows that the addition of metallic impurity does not alter the basic structure of the parent crystal, but increases the cell volume markedly. The presence of functional groups has been identified using FT-IR analysis. Further the grown crystal is characterized by optical transmission analysis and thermal analysis. The thermal stability of the grown crystal is high, compared to pure CMTC crystal. The optical transparency of the grown crystal is studied by UV-Vis-NIR analysis. This study reveals that Co²⁺ mixed CMTC crystal has wider transparent waveband than pure CMTC crystal. The relative second harmonic generation efficiency of the Co²⁺ mixed CMTC crystal has been tested by Kurtz-Perry powder technique.

Keywords

Crystal Growth; Slow Evaporation Method; X-Ray Technique; FT-IR; Nonlinear Optical Material; Thermal Analysis

Conflicts of Interest

The authors declare no conflicts of interest.

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