Synthesis, Growth and Characterisation of Nonlinear Optical La-doped L-Prolinium Picrate Single Crystals

Abstract

A nonlinear optical material L-Prolinium Picrate and Lanthanum doped L-Prolinium Picrate were synthesized and grown as single crystals by slow evaporation method. The grown crystals were subjected to structural, elemental, thermal, optical, mechanical and dielectric studies. The structural analysis reveals that pure LPP and La doped L-Prolinium Picrate belongs to the monoclinic crystallographic system with space group P 21 . Optical transparency of the grown crystals was investigated by UV-vis-NIR spectrum. The thermal analyses reveal that La doped L-Prolinium Picrate is thermally stable up to 188°C. The dielectric constant and dielectric loss of the crystals were studied as a function of frequency. The nonlinear optical property of the doped crystal was confirmed by the Kurtz-powder second harmonic generation test and the result is compared with pure L-Prolinium Picrate. Mechanical strength of the crystals was also carried out by Vicker's micro hardness test.