Broadband light emission induced by laser absorption and optimized by thermal injection in Nd ³⁺ :Y <sub/>2</sub> SiO <sub/>5</sub> ceramic powder

摘要： Laser induced broadband (white) light emission has been studied in different particle systems for use in light emitting devices. The photoinduced phenomenon occurs above a certain excitation power threshold and it is generally studied under vacuum conditions. In this work, the phenomenon is studied in neodymium doped yttrium silicate ceramic powder synthesized by combustion method. White light is observed when the sample is excited in ambient air with a CW near-infrared (λ = 808 nm) laser powered above 1.3 W. When the temperature of the sample is externally raised above 200 oC, white light is observed above 1.0 W and a large enhancement of the broadband emission intensity is observed.