Abstract
Manganese doped Li2B4O7 nano crystallites were prepared by chemical method and characterized by XRD, FTIR, UV and fluorescence spectra. FESEM reveals that the particles are coagulated and the particle size is in the range of 50–107nm. Bands appear at 682–769cm−1corresponds to the bending of B–O linkage in borate network. Nonradiative energy transfer process is observed from fluorescence spectrum. UV–Vis studies show the samples are completely transparent in the visible region and having absorption peaks (234 and 276nm) in UV regime. The measured second harmonic generation values are 0.9 times KDP. The nonlinear optical parameters such as nonlinear refractive index, n2 (10−8cm2/W), nonlinear absorption, β (10−2cm/W) and nonlinear optical susceptibility, χ(3) (10−5esu) are estimated using a Nd:YAG laser (532nm, 50mW).
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