A comparative study of pure and Amaranth dye doped L-Alanine Thiourea single crystals

Amaranth dye doped L-Alanine Thiourea single crystals were grown by slow evaporation technique with the vision to improve the properties of the crystal. The crystal structure of doped crystal was determined from Single crystal X-Ray diffraction and Powder X-Ray diffraction studies. The doping of the Amaranth dye in the grown crystal has been confirmed qualitatively by the FT-IR spectroscopy. The optical transparency of the crystals was identified from the UV-vis-NIR transmission spectrum. Thermo Gravimetric Analysis shows that the thermal stability of the crystal increases with dopant concentration. The doping of Amaranth dye increases the thermal stability, mechanical strength and laser damage threshold of the grown crystals compared to pure LATU crystals. The crystals were further subjected to other important characterizations such as dielectric measurement and NLO studies. The improvement in Second Harmonic Generation efficiency of doped crystal has also been reported.