Good quality single crystals of L-alanine hydrobromide (LAlHBr) were grown by slow solvent evaporation technique. Single crystal X-ray diffraction studies were carried out to confirm the grown LAlHBr crystals. UV–Vis–NIR studies have been carried out and the absorption of these grown crystals were analyzed. It was found that these crystals possess minimum absorption in the entire visible region. The functional groups of LAlHBr crystals were analyzed by Fourier transform Infrared (FT–IR) studies. Photoconductivity studies were carried out and it reveals that LAlHBr shows negative photoconductivity. Nonlinear optical studies of crystals were carried out and the second harmonic generation efficiency of the powdered sample was measured using Nd:YAG Q-switched laser. SHG efficiency of LAlHBr crystal is found to be greater than KDP.
