中国物理B ›› 2025, Vol. 34 ›› Issue (12): 124201-124201.doi: 10.1088/1674-1056/ade8e1

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Enhancement of electromagnetically induced absorption and four-wave mixing in a double two-level system

Yu-Sen Wang(王禹森)1 and Ying-Jie Du(杜英杰)1,2,†   

  1. 1 School of Physics, Northwest University, Xi'an 710127, China;
    2 Collaborative Innovation Center of Extreme Optics, Shanxi University, Taiyuan 030006, China
  • 收稿日期:2025-04-18 修回日期:2025-06-11 接受日期:2025-06-27 出版日期:2025-11-25 发布日期:2025-11-25
  • 通讯作者: Ying-Jie Du E-mail:yingjied@nwu.edu.cn
  • 基金资助:
    Project supported by the Open Subject of the State Key Laboratory of Quantum Optics Technologies and Devices (Grant No. KF202209).

Enhancement of electromagnetically induced absorption and four-wave mixing in a double two-level system

Yu-Sen Wang(王禹森)1 and Ying-Jie Du(杜英杰)1,2,†   

  1. 1 School of Physics, Northwest University, Xi'an 710127, China;
    2 Collaborative Innovation Center of Extreme Optics, Shanxi University, Taiyuan 030006, China
  • Received:2025-04-18 Revised:2025-06-11 Accepted:2025-06-27 Online:2025-11-25 Published:2025-11-25
  • Contact: Ying-Jie Du E-mail:yingjied@nwu.edu.cn
  • About author:2025-124201-250688.pdf
  • Supported by:
    Project supported by the Open Subject of the State Key Laboratory of Quantum Optics Technologies and Devices (Grant No. KF202209).

摘要: We present a theoretical investigation of the electromagnetically induced absorption (EIA) due to transfer of population (TOP) in the double two-level system (TLS). It shows that one TLS is responsible for the sub-natural absorption part of EIA, and the other TLS is responsible for the natural absorption part of EIA. We propose a scheme in which the sub-natural absorption part of EIA is governed by the effect of coherent hole burning (CHB) and achieves an enhancement of at least two orders of magnitude with the detuned coupling field, while the natural absorption part is dominated by the effect of Mollow absorption (MA) and does not change with the detuned coupling field. Due to the effects of CHB and MA, the magnitude of four-wave mixing (FWM) achieves a significant increase for double TLS. We show in detail the evolution of the magnitude of the FWM signal with coupling detuning and Rabi frequency. It is demonstrated that strong resonances occur in the FWM profile at frequencies symmetrically displaced from the frequency of the coupling field by coupling detuning.

关键词: electromagnetically induced absorption, coherent hole burning, Mollow absorption, four-wave mixing

Abstract: We present a theoretical investigation of the electromagnetically induced absorption (EIA) due to transfer of population (TOP) in the double two-level system (TLS). It shows that one TLS is responsible for the sub-natural absorption part of EIA, and the other TLS is responsible for the natural absorption part of EIA. We propose a scheme in which the sub-natural absorption part of EIA is governed by the effect of coherent hole burning (CHB) and achieves an enhancement of at least two orders of magnitude with the detuned coupling field, while the natural absorption part is dominated by the effect of Mollow absorption (MA) and does not change with the detuned coupling field. Due to the effects of CHB and MA, the magnitude of four-wave mixing (FWM) achieves a significant increase for double TLS. We show in detail the evolution of the magnitude of the FWM signal with coupling detuning and Rabi frequency. It is demonstrated that strong resonances occur in the FWM profile at frequencies symmetrically displaced from the frequency of the coupling field by coupling detuning.

Key words: electromagnetically induced absorption, coherent hole burning, Mollow absorption, four-wave mixing

中图分类号:  (Effects of atomic coherence on propagation, absorption, and Amplification of light; electromagnetically induced transparency and Absorption)

  • 42.50.Gy
32.80.Qk (Coherent control of atomic interactions with photons) 42.65.-k (Nonlinear optics)