Growth and characterization of nonlinear optical zinc hydrogen phosphate single crystal grown in silica gel by C. Justin Raj, G. Mangalam, S. Mary Navis Priya, J. Mary Linet, C. Vesta, S. Dinakaran, B. Milton Boaz, and S. Jerome Das

Crystal Research and Technology

Cryst. Res. Technol. 42, 344 (2007) - Abstract -

Growth and characterization of nonlinear optical zinc hydrogen phosphate single crystal grown in silica gel

C. Justin Raj**, G. Mangalam, S. Mary Navis Priya**, J. Mary Linet**, C. Vesta**, S. Dinakaran**, B. Milton Boaz*, and S. Jerome Das**

Department of Physics, Dr. M. G. R Educational and Research Institute, Madhuravoyal, Chennai – 600 095, India
*Department of Physics, SRM Instititute of Science and Technology, Kattankullatur-603 203, India
**Department of Physics, Loyola College, Chennai – 600 034, India

Keywords	characterization, crystal growth, non-linear optical materials, gel growth
PACS	81.10.-h, 42.65, 87.67.Cc
DOI	10.1002/crat.200610826

Good optical quality single crystals of zinc hydrogen phosphate (ZnHPO₄) having dimensions up to 8x2x2 mm³ have been grown with the aid of sodium meta silicate gel. Single crystal XRD studies confirm that the crystal belongs to the orthorhombic system with space group P2₁2₁2₁. The functional groups present in the crystals were confirmed using FTIR technique. Optical absorbance shows very low absorption in the entire visible region. Differential thermal and thermo gravimetric analysis confirmed that the crystal is stable up to 193°C. Photoconductivity study reveals positive photoconductivity in the presence of photo active centers formed by trap energy levels. The NLO activity of the crystal was confirmed by Kurtz powder technique.

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