Effect of Li and NH 4 doping on the crystal perfection, second harmonic generation efficiency and laser damage threshold of potassium pentaborate crystals

摘要

Highlights?5?mol% of Li and NH4doped KB5 crystals have been synthesized.?HRXRD analysis shows that doped crystals posses grain boundaries.?Doping influences the LDT values irrespective of crystalline perfection.AbstractPotassium pentaborate (KB5) is an excellent nonlinear optical material especially in the UV region. In this work, Li and NH4doped KB5 crystals were grown using slow evaporation solution growth method. The incorporation of dopant has been confirmed and analysed by Energy dispersive X-ray analysis (EDAX), Inductively coupled plasma (ICP) analysis and Raman spectroscopy. The crystalline perfection of pure and doped KB5 crystals was studied by High resolution X-ray diffraction (HRXRD) analysis. Structural grain boundaries were observed in doped crystals. Second harmonic generation was confirmed for pure and doped crystals and output values revealed the enhancement of SHG efficiency in doped crystals. Resistance against laser damage was carried out