Studies on growth, structural, dielectric, laser damage threshold, linear and nonlinear optical properties of methylene blue admixtured l-arginine phosphate single crystal

l-Arginine phosphate (LAP) and methylene blue dye admixtured l-arginine phosphate single crystals were grown by slow cooling technique and their cell parameters, crystalline perfection, dopant inclusion were confirmed by single crystal, powder X-ray diffraction and high resolution X-ray diffraction analyses respectively. The modes of vibrations of different functional groups present in pure and dye admixtured LAP crystals have been identified by FTIR spectral analysis. The UV–Vis–NIR spectral study was performed on the grown crystals and found that the crystals are transparent in the entire visible–NIR region. The dielectric measurement was carried out on the grown crystals as a function of frequency at room temperature. The microhardness hardness study on (1 0 0) plane of grown crystals reveals the mechanical behavior of the crystals. The laser damage threshold value significantly enhanced for dye admixtured crystal in comparison with pure LAP crystal. The relative SHG efficiency of methylane blue admixtured LAP crystal was found to be 1.3 times higher than that of pure LAP crystal.

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► Bulk crystal of methylene blue dye doped LAP was grown by slow cooling technique.
► Optical band gap was estimated using UV–Vis spectral data.
► Laser damage threshold value of LAP is increased by dye doping.
► SHG efficiency of doped LAP was found to be 1.3 times that of pure LAP crystal.