Enhanced spontaneous emission in a photonic-crystal light-emitting diode

被引：41
|
作者：
Francardi, M. [1 ]
Balet, L. [2 ,3 ]
Gerardino, A. [1 ]
Chauvin, N. [2 ]
Bitauld, D. [2 ]
Li, L. H. [3 ]
Alloing, B. [3 ]
Fiore, A. [2 ]
机构：
[1] CNR, Inst Photon & Nanotechnol, I-00156 Rome, Italy
[2] Eindhoven Univ Technol, COBRA Res Inst, NL-5600 MB Eindhoven, Netherlands
[3] Ecole Polytech Fed Lausanne, Inst Photon & Quantum Elect, CH-1015 Lausanne, Switzerland
来源：
APPLIED PHYSICS LETTERS | 2008年 / 93卷 / 14期
基金：
瑞士国家科学基金会;
关键词：
D O I：
10.1063/1.2964186
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
We report direct evidence of enhanced spontaneous emission in a photonic-crystal (PhC) light-emitting diode. The device consists of p-i-n heterojunction embedded in a suspended membrane, comprising a layer of self-assembled quantum dots. Current is injected laterally from the periphery to the center of the PhC. A well-isolated emission peak at 1.3 mu m from the PhC cavity mode is observed, and the enhancement of the spontaneous emission rate is clearly evidenced by time-resolved electroluminescence measurements, showing that our diode switches off in a time shorter than the bulk radiative and nonradiative lifetimes. (C) 2008 American Institute of Physics.
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页数：3
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