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

作　　者：叶寒 彭益炜 俞重远 张文 刘玉敏 

机构地区：[1]State Key Laboratory of Information Photonics and Optical Communications,Beijing University of Posts and Telecommunications

出　　处：《Chinese Physics B》2015年第11期260-265,共6页中国物理B（英文版）

基　　金：supported by the National Natural Science Foundation of China(Grant Nos.61372037 and 61401035);the Beijing Excellent Ph.D.Thesis Guidance Foundation,China(Grant No.20131001301);the Fund of State Key Laboratory of Information Photonics and Optical Communications(Beijing University of Posts and Telecommunications),China(Grant No.IPOC2015ZC05)

摘　　要：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.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.

关 键 词：sub-Poissonian statistics quantum dots MICROCAVITY single photon 

分 类 号：O413.2[理学—理论物理]