Sub-Poissonian photon emission in coupled double quantum dots-cavity system

In this work, we theoretically analyze the few-photon emissions generated in a coupled double quantum dots （CDQDs）-single mode microcavity system, under continuous wave and pulse excitation. Compared with the uncoupled case, strong sub-Poissonian character is achieved in a CDQDs--cavity system at a...

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Bibliographic Details
Published inChinese physics B Vol. 24; no. 11; pp. 260 - 265
Main Author 叶寒 彭益炜 俞重远 张文 刘玉敏
Format Journal Article
LanguageEnglish
Published 01.11.2015
Subjects
Autocorrelation functions
Holes
Joining
Lasers
Microcavities
Photon emission
Quantum dots
Robustness
亚泊松特性
共振条件
单光子
激光频率
系统
耦合双量子点
脉冲激励
谐振条件
Online AccessGet full text
ISSN1674-1056
2058-3834
1741-4199
DOI10.1088/1674-1056/24/11/114202

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Summary:In this work, we theoretically analyze the few-photon emissions generated in a coupled double quantum dots （CDQDs）-single mode microcavity system, under continuous wave and pulse excitation. Compared with the uncoupled case, strong sub-Poissonian character is achieved in a CDQDs--cavity system at a certain laser frequency. Based on the pro- posed scheme, single photon generation can be obtained separately under QD-cavity resonant condition and off-resonant condition. For different cavity decay rates, we reveal that laser frequency detunings of minimum second-order autocorre- lation function are discrete and can be divided into three regions. Moreover, the non-ideal situation where two QDs are not identical is discussed, indicating the robustness of the proposed scheme, which possesses sub-Poissonian character in a large QD difference variation range.
Bibliography:sub-Poissonian statistics, quantum dots, microcavity, single photon
11-5639/O4
In this work, we theoretically analyze the few-photon emissions generated in a coupled double quantum dots （CDQDs）-single mode microcavity system, under continuous wave and pulse excitation. Compared with the uncoupled case, strong sub-Poissonian character is achieved in a CDQDs--cavity system at a certain laser frequency. Based on the pro- posed scheme, single photon generation can be obtained separately under QD-cavity resonant condition and off-resonant condition. For different cavity decay rates, we reveal that laser frequency detunings of minimum second-order autocorre- lation function are discrete and can be divided into three regions. Moreover, the non-ideal situation where two QDs are not identical is discussed, indicating the robustness of the proposed scheme, which possesses sub-Poissonian character in a large QD difference variation range.
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ISSN:1674-1056
2058-3834
1741-4199
DOI:10.1088/1674-1056/24/11/114202