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Etching, micro hardness and laser damage threshold studies of a nonlinear optical material L-valine

  • M. Anbuchezhiyan (a1), S. Ponnusamy (a2), C. Muthamizhchelvan (a2), C.C. Kanakam (a3), S.P. Singh (a4), P.K. Pal (a4) and P.K. Datta (a4)...

Abstract

A nonlinear optical crystal of L-valine was grown from an aqueous solution containing a small amount of phosphoric acid by the slow evaporation method. The grown crystal was characterized by a single crystal X-ray diffraction to determine the unit cell parameters. The powder X-ray diffraction analysis also confirmed the lattice parameters to be a = 9.6687(7) Å, b = 5.2709(4) Å, c = 12.0371(10) Å and β = 90.805(4)°. The results of the Inductively Coupled Plasma Optical Emission Spectrometry (ICPOES) indicate the presence of a small amount of phosphorus in the grown crystal. The Vickers micro hardness test was performed to study the mechanical strength of the crystals. Chemical etching studies were carried out to analyze the dislocation structure. The laser damaged threshold of the grown crystal was measured to be 11.11 GW/cm2 for 10 ns pulse at 1064 nm, which is higher than that of the standard nonlinear optical crystals like KDP. Second harmonic generation of the grown crystals was also 1.44 times that of KDP.

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Etching, micro hardness and laser damage threshold studies of a nonlinear optical material L-valine

  • M. Anbuchezhiyan (a1), S. Ponnusamy (a2), C. Muthamizhchelvan (a2), C.C. Kanakam (a3), S.P. Singh (a4), P.K. Pal (a4) and P.K. Datta (a4)...

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