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Broadband light emission induced by laser absorption and optimized by thermal injection in Nd 3+ :Y 2 SiO 5 ceramic powder
Author(s) -
Rakov Nikifor,
Maciel Glauco S.
Publication year - 2020
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/jace.16857
Subject(s) - materials science , laser , ceramic , excited state , absorption (acoustics) , yttrium , neodymium , analytical chemistry (journal) , excitation , light emission , transparent ceramics , optoelectronics , optics , doping , chemistry , atomic physics , oxide , metallurgy , physics , chromatography , composite material , electrical engineering , engineering
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 continuous‐wave near‐infrared ( λ = 808 nm) laser powered above 1.3 W. When the temperature of the sample is externally raised above 200°C, white light is observed above 1.0 W and a large enhancement of the broadband emission intensity is observed.