This article is cited in 7 papers

Optical properties

Spontaneous and stimulated red luminescence of Lu$_2$O$_3$ : Eu nanocrystals

A. N. Gruzintsev^a, G. A. Emel'chenko^b, Yu. V. Ermolaeva^c, V. M. Masalov^b, A. V. Tolmachev^c, P. Benalloul^d, C. Barthou<sup>d

a</sup> Institute of Microelectronics Technology and High-Purity Materials RAS
^b Institute of Solid State Physics, Russian Academy of Sciences, Chernogolovka, Moscow region
^c Institute for Single Crystals, National Academy of Sciences of Ukraine, Kharkov
^d Institut des NanoSciences de Paris, UPMC Univ Paris 06, CNRS, UMR, Paris, France

Abstract: The spectra of spontaneous and stimulated luminescence of Lu$_2$O$_3$ : Eu (7 at%) nanopowders at different optical pumping intensities have been investigated. The obtained results–changes in the shape of the red luminescence spectra and in the lifetime of the $^5D_0$ excited state of Eu$^{3+}$ ions–indicate the onset of superluminescence with an increase in the excitation power. It has been found that an increase in the optical pumping intensity leads to a decrease in the luminescence decay time of the Lu$_2$O$_3$ : Eu (7 at%) phosphor in the stimulated luminescence regime and to an increase in the quantum efficiency of red luminescence with a maximum at 611 nm.

Received: 08.11.2010

 English version: Physics of the Solid State, 2011, 53:6, 1263–1268

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