Confined diffusion of erbium excitations in SnO2 nanoparticles embedded in silica: A time-resolved infrared luminescence study

被引：18

作者：

Brovelli, S. ^{[1
,3
,4
]}

Chiodini, N. ^{[1
]}

Meinardi, F. ^{[1
]}

Monguzzi, A. ^{[1
]}

Lauria, A. ^{[1
]}

Lorenzi, R. ^{[1
]}

Vodopivec, B. ^{[1
]}

Mozzati, M. C. ^{[2
]}

Paleari, A. ^{[1
]}

机构：

[1] Univ Milan, CNISM Dept Mat Sci, I-20125 Milan, Italy

[2] Univ Pavia, CNISM Dept Phys Alessandro Volta, I-27100 Pavia, Italy

[3] UCL, London Ctr Nanotechnol, London WC1E 6BT, England

[4] UCL, Dept Phys & Astron, London WC1E 6BT, England

来源：

PHYSICAL REVIEW B | 2009年 / 79卷 / 15期

关键词：

diffusion; erbium; nanoparticles; paramagnetic resonance; photoluminescence; silicon compounds; time resolved spectra; 1.54; MU-M; NANOCRYSTAL-DOPED SIO2; ENERGY-TRANSFER; ER3+ IONS; RESONANCE; PHOTOLUMINESCENCE; DEVICES; GLASSES; EPR;

D O I：

10.1103/PhysRevB.79.153108

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We have identified, in erbium-doped silica with SnO2 nanocrystals, excitation-diffusion processes restricted to the single nanocrystal. Time-resolved measurements of erbium infrared luminescence excited by energy transfer via nanocrystal excitation, together with the identification and quantification of the nanophase-related Er3+ variety by its electron paramagnetic resonance, have allowed us to analyze the dependence of the excitation decay rate on the number of ions per nanoparticle and to reveal the effects of the discrete spatial domain composed by nanocrystals. Finally, a nonlinear relation is derived to describe the effects of Forster energy transfer in disconnected nanosystems.

引用

页数：4

共 29 条

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