Au Microdisk-Size Dependence of Quantum Dot Emission from the Hybrid Metal-Distributed Bragg Reflector Structures Employed for Single Photon Sources

We investigate metallic microdisk-size dependence of quantum dot （QD） spontaneous emission rate and micro- antenna directional emission effect for the hybrid metM-distributed Bragg reflector structures based on a particular single QD emission. It is found that the measured photolumineseence （PL） int...

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Published inChinese physics letters Vol. 32; no. 10; pp. 134 - 137
Main Author 王海艳 苏丹 杨爽 窦秀明 朱海军 江德生 倪海桥 牛智川 赵翠兰 孙宝权
Format Journal Article
LanguageEnglish
Published 01.10.2015
Subjects
Bragg reflectors
Disks
Emission
Emission analysis
Microscopes
Optimization
Quantum dots
Spontaneous emission
分布布拉格反射镜
单光子源
定向发射
尺寸效应
混合
结构
量子点
金属
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ISSN0256-307X
1741-3540
DOI10.1088/0256-307X/32/10/107804

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Summary:We investigate metallic microdisk-size dependence of quantum dot （QD） spontaneous emission rate and micro- antenna directional emission effect for the hybrid metM-distributed Bragg reflector structures based on a particular single QD emission. It is found that the measured photolumineseence （PL） intensity is very sensitive to the size of metMlic disk, showing an enhancement factor of 11 when the optimal disk diameter is 2μm and the numerical aperture of microscope objective NA=0.5. It is found that for large metal disks, the Purcell effect is dominant for enhanced PL intensity, whereas for small size disks the main contribution comes from plasmon scattering at the disk edge within the light cone collected by the microscope objective.
Bibliography:11-1959/O4
We investigate metallic microdisk-size dependence of quantum dot （QD） spontaneous emission rate and micro- antenna directional emission effect for the hybrid metM-distributed Bragg reflector structures based on a particular single QD emission. It is found that the measured photolumineseence （PL） intensity is very sensitive to the size of metMlic disk, showing an enhancement factor of 11 when the optimal disk diameter is 2μm and the numerical aperture of microscope objective NA=0.5. It is found that for large metal disks, the Purcell effect is dominant for enhanced PL intensity, whereas for small size disks the main contribution comes from plasmon scattering at the disk edge within the light cone collected by the microscope objective.
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ISSN:0256-307X
1741-3540
DOI:10.1088/0256-307X/32/10/107804