Spontaneous emission in the ellipsoidal nanocrystals
来源期刊：JOURNAL OF RARE EARTHS2009年第4期
论文作者：K.K.Pukhov
Key words：spontaneous emission; lifetime; nanocrystals; Judd-Ofelt parameters; rare earths;
Abstract: The equation was presented for the spontaneous emission rate Anano of the two-level optical centers in the subwavelength ellipsoidal nanocrystals embedded in a dielectric medium.An important result was that the ratio Anano/Abulk could be estimated without recourse to a particular local-field model.On the ground of this equation the expression was derived for linestrength of electric-dipole transition in trivalent rare-earth ions.The applicability of the Judd-Ofelt equation for nanoparticles was discussed.
K.K.Pukhov1
(1.General Physics Institute,Russian Academy of Sciences,38 Vavilov Str.Bld D,Moscow,119991,Russia)
Abstract:The equation was presented for the spontaneous emission rate Anano of the two-level optical centers in the subwavelength ellipsoidal nanocrystals embedded in a dielectric medium.An important result was that the ratio Anano/Abulk could be estimated without recourse to a particular local-field model.On the ground of this equation the expression was derived for linestrength of electric-dipole transition in trivalent rare-earth ions.The applicability of the Judd-Ofelt equation for nanoparticles was discussed.
Key words:spontaneous emission; lifetime; nanocrystals; Judd-Ofelt parameters; rare earths;
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