中国物理B ›› 2021, Vol. 30 ›› Issue (10): 104204-104204.doi: 10.1088/1674-1056/ac041e

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Fano interference and transparency in a waveguide-nanocavity hybrid system with an auxiliary cavity

Yu-Xin Shu(树宇鑫)1, Xiao-San Ma(马小三)1, Xian-Shan Huang(黄仙山)2, Mu-Tian Cheng(程木田)1,†, and Jun-Bo Han(韩俊波)3   

  1. 1 School of Electrical Engineering&Information, Anhui University of Technology, Maanshan 243002, China;
    2 School of Mathematics and Physics, Anhui University of Technology, Maanshan 243002, China;
    3 Wuhan National High Magnetic Field Center and Department of Physics, Huazhong University of Science and Technology, Wuhan 430074, China
  • 收稿日期:2021-01-15 修回日期:2021-03-03 接受日期:2021-05-24 出版日期:2021-09-17 发布日期:2021-09-17
  • 通讯作者: Mu-Tian Cheng E-mail:mtcheng@ahut.edu.cn
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant Nos. 11774262 and 11975023).

Fano interference and transparency in a waveguide-nanocavity hybrid system with an auxiliary cavity

Yu-Xin Shu(树宇鑫)1, Xiao-San Ma(马小三)1, Xian-Shan Huang(黄仙山)2, Mu-Tian Cheng(程木田)1,†, and Jun-Bo Han(韩俊波)3   

  1. 1 School of Electrical Engineering&Information, Anhui University of Technology, Maanshan 243002, China;
    2 School of Mathematics and Physics, Anhui University of Technology, Maanshan 243002, China;
    3 Wuhan National High Magnetic Field Center and Department of Physics, Huazhong University of Science and Technology, Wuhan 430074, China
  • Received:2021-01-15 Revised:2021-03-03 Accepted:2021-05-24 Online:2021-09-17 Published:2021-09-17
  • Contact: Mu-Tian Cheng E-mail:mtcheng@ahut.edu.cn
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant Nos. 11774262 and 11975023).

摘要: We investigate theoretically single photon transport in one-dimensional waveguide coupled to a pair of cavities, which are denoted by the first cavity and the auxiliary cavity. Two cases with no atom and one atom embedded in the first cavity are discussed. The Fano dips in the transmission spectrum and locations of transparency window are calculated. When no atom is embedded in the first cavity, there exists a transparency window under the condition that the first cavity and the auxiliary cavity are not resonant. The locations of the transparency window and Fano line type depend strongly on the eigen frequency of the auxiliary cavity and the coupling strength between the auxiliary cavity and the waveguide. When one atom is embedded in the first cavity, we show that the transparency window exists even though the first cavity, the atom and the auxiliary cavity are resonant. The Fano line type is strongly dependent on the eigen frequency of the auxiliary cavity and the coupling strength. Our results have potential applications in design of quantum devices at the level of single photon, such as single photon switch and single photon routers.

关键词: Fano interference, waveguide quantum electrodynamics, auxiliary cavity

Abstract: We investigate theoretically single photon transport in one-dimensional waveguide coupled to a pair of cavities, which are denoted by the first cavity and the auxiliary cavity. Two cases with no atom and one atom embedded in the first cavity are discussed. The Fano dips in the transmission spectrum and locations of transparency window are calculated. When no atom is embedded in the first cavity, there exists a transparency window under the condition that the first cavity and the auxiliary cavity are not resonant. The locations of the transparency window and Fano line type depend strongly on the eigen frequency of the auxiliary cavity and the coupling strength between the auxiliary cavity and the waveguide. When one atom is embedded in the first cavity, we show that the transparency window exists even though the first cavity, the atom and the auxiliary cavity are resonant. The Fano line type is strongly dependent on the eigen frequency of the auxiliary cavity and the coupling strength. Our results have potential applications in design of quantum devices at the level of single photon, such as single photon switch and single photon routers.

Key words: Fano interference, waveguide quantum electrodynamics, auxiliary cavity

中图分类号:  (Quantum optical phenomena in absorbing, amplifying, dispersive and conducting media; cooperative phenomena in quantum optical systems)

  • 42.50.Nn
42.50.Ct (Quantum description of interaction of light and matter; related experiments) 32.70.Jz (Line shapes, widths, and shifts)