Crystalline perfection and optical studies of l-Histidinium dihydrogen phosphate orthophosphoric acid (LHDP) single crystals

Abstract Single crystals of l -Histidinium dihydrogenphosphate orthophosphoric acid (LHDP) were grown by slow evaporation solution growth technique. The grown crystals were confirmed by single crystal X-ray diffraction techniques. The HRXRD rocking curve measurements revealed the crystalline perfection of grown crystal and the absence of structural grain boundaries. The lower optical cut-off wavelength for this crystal was observed at 240 nm. The third order nonlinear refractive index ( n 2 ), nonlinear absorption coefficient ( β ) and susceptibility ( χ (3) ) were calculated by Z-scan studies using Nd: YAG laser as a source. The single shot laser damage threshold of grown crystal was measured to be 6.286 GW/cm 2 using Nd: YAG laser.