Spontaneous emission enhancement and saturable absorption of colloidal quantum dots coupled to photonic crystal cavity

被引：33
|
作者：
Gupta, Shilpi [1 ,2 ]
Waks, Edo [1 ,2 ]
机构：
[1] Univ Maryland, Dept Elect & Comp Engn, Inst Res Elect & Appl Phys, College Pk, MD 20742 USA
[2] Univ Maryland, Joint Quantum Inst, College Pk, MD 20742 USA
来源：
OPTICS EXPRESS | 2013年 / 21卷 / 24期
基金：
美国国家科学基金会;
关键词：
OPTICAL BISTABILITY; NANOCRYSTALS; INTENSITY; ABSORBERS; DESIGN; SCALE;
D O I：
10.1364/OE.21.029612
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
We demonstrate spontaneous emission rate enhancement and saturable absorption of cadmium selenide colloidal quantum dots coupled to a nanobeam photonic crystal cavity. We perform time-resolved lifetime measurements and observe an average enhancement of 4.6 for the spontaneous emission rate of quantum dots located at the cavity as compared to those located on an unpatterned surface. We also demonstrate that the cavity linewidth narrows with increasing pump intensity due to quantum dot saturable absorption. (C) 2013 Optical Society of America
引用
收藏
页码：29612 / 29619
页数：8
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