Reducing inhomogeneity in the dynamic properties of quantum dots via self-aligned plasmonic cavities

被引：0
|
作者：
Demory, Brandon [1 ]
Hill, Tyler A. [2 ]
Teng, Chu-Hsiang [1 ]
Deng, Hui [2 ]
Ku, P. C. [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：
NANOTECHNOLOGY | 2018年 / 29卷 / 01期
基金：
美国国家科学基金会;
关键词：
quantum efficiency; plasmonic coupling; metallic cavity; quantum dots; III-nitride; SINGLE-PHOTON EMISSION; ENHANCEMENT; EFFICIENCY; SILVER;
D O I：
10.1088/1361-6528/aa994c
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
A plasmonic cavity is shown to greatly reduce the inhomogeneity of dynamic optical properties such as quantum efficiency and radiative lifetime of InGaN quantum dots. By using an open-top plasmonic cavity structure, which exhibits a large Purcell factor and antenna quantum efficiency, the resulting quantum efficiency distribution for the quantum dots narrows and is no longer limited by the quantum dot inhomogeneity. The standard deviation of the quantum efficiency can be reduced to 2% while maintaining the overall quantum efficiency at 70%, making InGaN quantum dots a viable candidate for high-speed quantum cryptography and random number generation applications.
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页数：8
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