Mode coupling and photon antibunching in a bimodal cavity containing a dipole quantum emitter

Yu-Long Liu, Guan-Zhong Wang, Yu-xi Liu, and Franco Nori
Phys. Rev. A 93, 013856 – Published 28 January 2016

Abstract

We study the effect of mode coupling on a single-photon device in which a dipole quantum emitter (DQE) is embedded in a bimodal whispering-gallery-mode cavity. A scatterer is used to induce mode coupling between counterclockwise and clockwise propagating light fields, which interact with the DQE. We find that the antibunching increases when an additional cavity field is coupled to the DQE interacting with a cavity field. In contrast to models for the interaction between a DQE and a (one-mode or two-mode) cavity field, we find that a strong photon antibunching can occur, even for a weaker DQE-field coupling strength and large dephasing of the DQE, when mode coupling is introduced. We also find that mode coupling can make the device robust against either (1) the frequency mismatch between cavity modes and the DQE or (2) the coupling strength mismatch between the DQE and each mode in the two-mode cavity. Moreover, we find that these mismatches can be used to generate better antibunching. Our study shows that mode coupling in a bimodal cavity is very important for the realization of a good single-photon device.

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  • Received 1 July 2015

DOI:https://doi.org/10.1103/PhysRevA.93.013856

©2016 American Physical Society

Physics Subject Headings (PhySH)

Atomic, Molecular & Optical

Authors & Affiliations

Yu-Long Liu1,2,3, Guan-Zhong Wang1, Yu-xi Liu1,2,3,*, and Franco Nori3,4

  • 1Institute of Microelectronics, Tsinghua University, Beijing 100084, China
  • 2Tsinghua National Laboratory for Information Science and Technology (TNList), Beijing 100084, China
  • 3CEMS, RIKEN, Saitama 351-0198, Japan
  • 4Department of Physics, The University of Michigan, Ann Arbor, Michigan 48109-1040, USA

  • *yuxiliu@mail.tsinghua.edu.cn

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Vol. 93, Iss. 1 — January 2016

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