Growth, thermal and optical studies of a new organic NLO material: L-methionine L-methioninium hydrogen maleate

A new organic nonlinear optical crystal, L-methionine L-methioninium hydrogen maleate was crystallized from aqueous solution. Bulk crystals were grown using submerged seed solution method and characterized using single crystal X-ray diffraction. The thermal decomposition of the material was analyzed by thermogravimetric analysis. The various vibrational modes of the functional groups were identified by using Fourier transform infrared spectroscopy. Optical behavior such as transmission spectra and second harmonic generation efficiency were investigated to explore the nonlinear optical characteristics of the material. The second harmonic conversion efficiency is 90% of that of the standard potassium dihydrogen phosphate.