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

页码：1065 / 1070

页数：6

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