Plasmonic Enhancement of Single Photon Emission from a Site-Controlled Quantum Dot

被引：23
作者：
Demory, Brandon [1 ]
Hill, Tyler A. [2 ]
Teng, Chu-Hsiang [1 ]
Zhang, Lei [2 ]
Deng, Hui [2 ]
Ku, Pei-Cheng [1 ]
机构：
[1] Univ Michigan, Dept Elect Engn & Comp Sci, Ann Arbor, MI 48109 USA
[2] Univ Michigan, Dept Phys, Ann Arbor, MI 48109 USA
来源：
ACS PHOTONICS | 2015年 / 2卷 / 08期
基金：
美国国家科学基金会;
关键词：
plasmonic coupling; metallic cavity; quantum dots; III-nitride; single photon emission; site control; MOLECULE; DIAMOND;
D O I：
10.1021/acsphotonics.5b00086
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
We showed enhanced single photon emission via exciton plasmon coupling in a metal-encapsulated site-controlled quantum dot (QD) structure. It was observed that the average QD luminescence was enhanced by a factor of 7.33 +/- 1.32 and the exciton lifetime was reduced by a factor of 12.8 +/- 1.10. The exciton plasmon coupling was enhanced by matching the exciton energy to the localized surface plasmon resonance. Due to the sensitivity of the plasmonic enhancement to dot-to-dot variations, measurements were performed on the same dot at different stages of the sample processing, enabled by the use of a novel site-controlled InGaN QD structure. This was then repeated over a large number of dots and compared between different metal materials to investigate the nature of the coupling.
引用
收藏
页码：1065 / 1070
页数：6
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