Energy transfer from Cr to Nd in substitutional crystal Y3GaxAl5-x O12 codoped with Nd and Cr

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Takagi, Kazuki and Yamaga, Mitsuo and Villora, Encarnacion G. and Shimamura, Kiyoshi and Hasegawa, Kazuo and Ito, Hiroshi and Mizuno, Shintaro and Takeda, Yasuhiko and Han, Thomas P J (2016) Energy transfer from Cr to Nd in substitutional crystal Y3GaxAl5-x O12 codoped with Nd and Cr. Journal of Luminescence, 169 (Part A). pp. 65-71. ISSN 0022-2313 (https://doi.org/10.1016/j.jlumin.2015.08.044)

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Abstract

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.

ORCID iDs

Takagi, Kazuki, Yamaga, Mitsuo, Villora, Encarnacion G., Shimamura, Kiyoshi, Hasegawa, Kazuo, Ito, Hiroshi, Mizuno, Shintaro, Takeda, Yasuhiko and Han, Thomas P J ORCID logoORCID: https://orcid.org/0000-0002-2303-6861;
CORE (COnnecting REpositories)