IMF2017

SBN:60 crystal grown by the Czochralski method with a doping concentration of 0.03%weight (0.015% Cr : 0.015% MO) when excited with 800 nm Ti:Sapphire femtosecond laser pulses, found to emit light with wavelengths varying across the entire visible range. The emitted light can be tuned both by the intensity and the polarization of the excitation beam. The upconverted emission is polarized and of appreciable intensity. While the unpoled crystal gives planar SHG, the upconversion gives conical emissions. The novel phenomena are attributed to the level splitting due to double doping at the B-site along with localized trapping centers formed by the donor and acceptor concentration gradient.