Abstract
We report the generation of wideband white light with a spectrum ranging from 400 to 800nm obtained from sol–gel derived γ-Y2Si2O7 nano powders with average particle size under 100nm when excited with the 803.5nm emission of a laser diode.The white light intensity was found to increase with decreasing environment pressure and increasing laser pumping power. The International Commission on Illumination coordinates were found to be x=0.3408 and y=0.3100 under 803.5nm excitation. These values lie in the yellowish region and correspond to color temperature values of 5030K with a color rendering index of 85. The illuminance value was found to be 1456lux.
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