Two-photon emission in coupled biexciton quantum dot–cavity system: Phonon-assisted model

doi:10.1088/1674-1056/23/12/124204

中国物理B ›› 2014, Vol. 23 ›› Issue (12): 124204-124204.doi: 10.1088/1674-1056/23/12/124204

• ELECTROMAGNETISM, OPTICS, ACOUSTICS, HEAT TRANSFER, CLASSICAL MECHANICS, AND FLUID DYNAMICS • 上一篇下一篇

Two-photon emission in coupled biexciton quantum dot–cavity system: Phonon-assisted model

彭益炜, 俞重远, 刘玉敏, 伍铁生, 张文

State Key Laboratory of Information Photonics and Optical Communications (Beijing University of Posts and Telecommunications), Beijing 100876, China

收稿日期:2014-05-23 修回日期:2014-06-30 出版日期:2014-12-15 发布日期:2014-12-15
基金资助:
Project supported by the National Natural Science Foundation of China (Grant Nos. 61275201 and 61372037), the Beijing Municipal Excellent Ph. D. Thesis Guidance Foundation (Grant No. 20131001301), and the Fund of State Key Laboratory of Information Photonics and Optical Communications (Beijing University of Posts and Telecommunications), China.

Two-photon emission in coupled biexciton quantum dot–cavity system: Phonon-assisted model

Peng Yi-Wei (彭益炜), Yu Zhong-Yuan (俞重远), Liu Yu-Min (刘玉敏), Wu Tie-Sheng (伍铁生), Zhang Wen (张文)

State Key Laboratory of Information Photonics and Optical Communications (Beijing University of Posts and Telecommunications), Beijing 100876, China

Received:2014-05-23 Revised:2014-06-30 Online:2014-12-15 Published:2014-12-15
Contact: Yu Zhong-Yuan E-mail:yuzhongyuan30@gmail.com
Supported by:
Project supported by the National Natural Science Foundation of China (Grant Nos. 61275201 and 61372037), the Beijing Municipal Excellent Ph. D. Thesis Guidance Foundation (Grant No. 20131001301), and the Fund of State Key Laboratory of Information Photonics and Optical Communications (Beijing University of Posts and Telecommunications), China.

摘要/Abstract

摘要：

We theoretically analyze the steady state emission spectrum and transient temporal dynamics in a coupled biexciton quantum dot (QD)–cavity system. For steady state, a phonon-assisted biexciton–exciton cascade model under continuous wave (CW) excitation is presented to explain the asymmetric QD–cavity emission spectrum intensities (intensities of cavity, exciton, and biexciton emission peak) in off-resonance condition. Results demonstrate that the electron–phonon process is crucial to the asymmetry of emission spectrum intensity. Moreover the transient characteristics of the biexciton–exciton cascade system under pulse excitation show abundant nonlinear temporal dynamic behaviors, including complicated oscillations which are caused by the four-level structure of QD model. We also reveal that under off-resonance condition the cavity outputs are slightly reduced due to the electron–phonon interaction.

关键词: biexciton–, exciton cascade, phonon, emission spectrum, temporal dynamic

Abstract:

Key words: biexciton–, exciton cascade, phonon, emission spectrum, temporal dynamic

中图分类号: (Cavity quantum electrodynamics; micromasers)

42.50.Pq

78.67.Hc (Quantum dots) 42.50.Ct (Quantum description of interaction of light and matter; related experiments)

彭益炜, 俞重远, 刘玉敏, 伍铁生, 张文. Two-photon emission in coupled biexciton quantum dot–cavity system: Phonon-assisted model[J]. 中国物理B, 2014, 23(12): 124204-124204.

Peng Yi-Wei (彭益炜), Yu Zhong-Yuan (俞重远), Liu Yu-Min (刘玉敏), Wu Tie-Sheng (伍铁生), Zhang Wen (张文). Two-photon emission in coupled biexciton quantum dot–cavity system: Phonon-assisted model[J]. Chin. Phys. B, 2014, 23(12): 124204-124204.

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Two-photon emission in coupled biexciton quantum dot–cavity system: Phonon-assisted model

Two-photon emission in coupled biexciton quantum dot–cavity system: Phonon-assisted model

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