US EPA

8802769 

Journal Article 

Influence of uranyl on the growth, linear, laser damage threshold and nonlinear optical studies on potential nonlinear optical single crystal: L-Alanine 

Rathika Thaya Kumari, C; Nageshwari, M; Sudha, S; Lydia Caroline, M; Mani, G 

2015 

2015-October 

166-170 

English 

Effect of uranyl on the growth and properties of L-Alanine (LA) single crystals has been studied. Single crystals of pure and uranyl doped LA was obtained with well-defined morphology. The as grown metal doped and pure single crystals were characterized using single crystal XRD technique which confirmed that the incorporation of metallic dopants has not changed the basic structure of the parent crystal. The pure and doped LA crystals have good transmission range extending from the ultraviolet into the infrared region. Fourier transform infrared (FTIR) spectroscopy were carried out to investigate the molecular vibrations of these crystals and to confirm the incorporation of the dopants. The thermal properties have been studied by TGA/DTA curves. The EDAX measurement and surface morphology was studied for pure and metal doped LA crystals. The second harmonic generation (SHG) study shows the nonlinear optical efficiency of the crystals. The laser damage threshold was measured for pure and metal doped LA crystals and also tested by using a Q-switched Nd: YAG laser with 21.1 MW/cm2 for LA and 32.39 MW/cm2 for uranyl doped LA crystals showing enhanced LDT value for metal doped uranyl LA crystal compared to pure LA crystal due to the metallic substitutions thus proving their useful candidature for nonlinear optical applications. 

Nonlinear; Optical studies.; Threshold