Space-separated quantum cutting in differently prepared solid-state dispersions of Si nanocrystals and Er3+ ions in SiO2

被引：4

作者：

Timmerman, D. ^{[1
]}

Gregorkiewicz, T. ^{[1
]}

机构：

[1] Univ Amsterdam, van der Waals Zeeman Inst, NL-1018 XE Amsterdam, Netherlands

来源：

MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE MATERIALS | 2009年 / 159-60卷

关键词：

Silicon; Erbium; Excitation; Quantum structures; Photoluminescence; Quantum cutting; Optical properties; SILICON NANOCRYSTALS; DOTS;

D O I：

10.1016/j.mseb.2009.02.010

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We investigate the efficiency of Si nanocrystal-mediated photoluminescence of Er3+ ions in SiO2 as a function of quantum energy of incoming photons. We demonstrate that for identical nanocrystals the threshold energy of the recently reported space-separated quantum Cutting effect does not change with the nanocrystal-to-Er distance. In contrast, the enhancement of excitation efficiency observed above the threshold, in the high-energy photon regime, diminishes at larger separations, thus exhibiting a clear nanocrystal-to-Er distance dependence. (C) 2009 Elsevier B.V. All rights reserved.

引用

页码：87 / 89

页数：3

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