DocumentCode :
104026
Title :
Broadband Visible Light Emission From Nominally Undoped and 
Doped Garnet Nanopowders
Author :
Bilir, G. ; Ozen, G. ; Bettinelli, M. ; Piccinelli, F. ; Cesaria, M. ; Di Bartolo, B.
Author_Institution :
Dept. of Phys., Istanbul Tech. Univ., Istanbul, Turkey
Volume :
6
Issue :
4
fYear :
2014
fDate :
Aug. 2014
Firstpage :
1
Lastpage :
11
Abstract :
Synthetic garnet nanopowders of Y3Al5O12 (YAG) and Gd3Ga5O12 (GGG) were produced, and the occurrence of a broadband bright visible emission by nominally undoped YAG and GGG and Cr3+ doped GGG, depending on the environment pressure, as well as exciting on the pumping power, was demonstrated. The results indicate that high-intensity infrared laser irradiation in samples not only leads to heating (melting effects) but also produces visible broadband emission. Low pressure of the powders´ environment favors the white light emission by lowering the threshold pumping power. A hypothesis on the nature of the emission is presented.
Keywords :
chromium; gadolinium compounds; garnets; heating; laser beam effects; melting; nanoparticles; optical pumping; photoluminescence; yttrium compounds; Gd3Ga5O12; Gd3Ga5O12:Cr; YAG; broadband bright visible emission; broadband visible light emission; doped garnet nanopowders; heating effects; high-intensity infrared laser irradiation; melting effects; nominally undoped garnet nanopowders; pumping power; threshold pumping power; Broadband communication; Garnets; Laser excitation; Phosphors; Powders; Temperature measurement; Garnets; laser diode excitation; nanocrystals; white light emission;
fLanguage :
English
Journal_Title :
Photonics Journal, IEEE
Publisher :
ieee
ISSN :
1943-0655
Type :
jour
DOI :
10.1109/JPHOT.2014.2337873
Filename :
6861947
Link To Document :
