P. Selvarajan

XRD,Optical,SHG and Hardness Studies of L- Alanine Crystals Grown in Aqueous Solution of Hydrofluoric Acid

A Nonlinear Optical (NLO) material has a nonlinear response to the electric field associated with the light of a laser beam, leading to a variety of optical phenomena such as generation of new light frequencies. L-alanine is an NLO material and it has a Second Harmonic Generation (SHG) efficiency of about 0.3 times that of KDP. To alter the various properties of L-alanine, single crystals of L-alanine have been grown in the aqueous solution of hydrofluoric acid and in this work, L-alanine was admixtured with hydrofluoric acid (LAHF) in the molar ratio of 1:1. The grown crystals were colorless and transparent and they were subjected to various studies for characterization.

Growth, Dielectric, Impedance and THG properties of DiAmmonium Hydrogen Phospho Tartrate (DAHPT) single crystals

Di-Ammonium Hydrogen Phospho Tartrate (DAHPT) single crystals have been grown successfully by slow evaporation technique. The structure of the grown crystal was estimated by single crystal X-ray diffraction technique. Dielectric study was carried out in the frequency range 20 Hz – 1 MHz and at different temperatures between 30° C and 150° C. The impedance analysis was studied using an impedance analyser to find the impedance, bulk resistance, and DC conductivity of the sample. The values of nonlinear refractive index, nonlinear absorption and third order nonlinear susceptibility have been studied using Z-scan technique.

Second order and Third order NLO studies of L- alanine crystals grown in aqueous solution of hydrofluoric acid (LAHF)

Nonlinear optics is a fascinating field, which plays a vital role in the emerging field of photonics and optoelectronics. A nonlinear optical crystal of L-alanine grown in aqueous solution of hydrofluoric acid is done by slow evaporation method. L-alanine is an NLO material and it has a Second Harmonic Generation (SHG) efficiency of about 0.3 times that of KDP. To alter the various properties of L-alanine, single crystals of L-alanine have been grown in the aqueous solution of hydrofluoric acid. In this work, Lalanine was admixtured with hydrofluoric acid (LAHF) in the molar ratio of 1:1. The grown crystals were colorless and transparent and they were subjected to various studies for characterization.The third-order nonlinearities of LAHF crystal have been investigated by Z-scan method. The values of nonlinear refractive index (n2), the nonlinear absorption coefficient (β) and third-order nonlinear susceptibility (χ) are estimated for the sample