TY - JOUR
T1 - Energy transfer from Cr to Nd in substitutional crystal Y3GaxAl5-x O12 codoped with Nd and Cr
AU - Takagi, Kazuki
AU - Yamaga, Mitsuo
AU - Villora, Encarnacion G.
AU - Shimamura, Kiyoshi
AU - Hasegawa, Kazuo
AU - Ito, Hiroshi
AU - Mizuno, Shintaro
AU - Takeda, Yasuhiko
AU - Han, Thomas P J
PY - 2016/1/1
Y1 - 2016/1/1
N2 - Garnet crystals codoped with Nd3+ and Cr3+ ions are a candidate for solar-pumped laser materials. Substitutional disordered crystals Y3GaxAl5-xO12 were prepared to improve the pumping efficiency of Nd3+ luminescence and energy transfer from Cr3+ to Nd3+ ions. The substitutional disordered crystal host produced inhomogeneous broadening of the Nd3+ and Cr3+ optical spectra. Enhancement of overlapping between the Cr3+ absorption bands and the solar spectrum, and between the Cr3+ luminescence bands and the Nd3+ absorption lines led to the increases of the pumping efficiency and the energy transfer rates, respectively. The excitation spectrum of the Nd3+ luminescence, the nonexponential decay curves of the Cr3+ luminescence, and the quantum yields of the Cr3+ and Nd3+ luminescence have given evidence on the energy transfer from Cr3+ to Nd3+ ions.
AB - Garnet crystals codoped with Nd3+ and Cr3+ ions are a candidate for solar-pumped laser materials. Substitutional disordered crystals Y3GaxAl5-xO12 were prepared to improve the pumping efficiency of Nd3+ luminescence and energy transfer from Cr3+ to Nd3+ ions. The substitutional disordered crystal host produced inhomogeneous broadening of the Nd3+ and Cr3+ optical spectra. Enhancement of overlapping between the Cr3+ absorption bands and the solar spectrum, and between the Cr3+ luminescence bands and the Nd3+ absorption lines led to the increases of the pumping efficiency and the energy transfer rates, respectively. The excitation spectrum of the Nd3+ luminescence, the nonexponential decay curves of the Cr3+ luminescence, and the quantum yields of the Cr3+ and Nd3+ luminescence have given evidence on the energy transfer from Cr3+ to Nd3+ ions.
KW - chromium
KW - energy transfer
KW - inhomogeneous broadening
KW - neodymium
KW - substitutional garnet crystal
UR - http://www.scopus.com/inward/record.url?scp=84941975698&partnerID=8YFLogxK
UR - http://www.sciencedirect.com/science/article/pii/S0022231315004809
U2 - 10.1016/j.jlumin.2015.08.044
DO - 10.1016/j.jlumin.2015.08.044
M3 - Article
AN - SCOPUS:84941975698
SN - 0022-2313
VL - 169
SP - 65
EP - 71
JO - Journal of Luminescence
JF - Journal of Luminescence
IS - Part A
ER -