Absorption spectra and enhanced Kerr nonlinearity in a four-level system

doi:10.1088/1674-1056/ad0622

中国物理B ›› 2023, Vol. 32 ›› Issue (11): 114214-114214.doi: 10.1088/1674-1056/ad0622

所属专题： SPECIAL TOPIC — Celebrating the 100th Anniversary of Physics Discipline of Northwest University

Absorption spectra and enhanced Kerr nonlinearity in a four-level system

Hao-Jie Huangfu(皇甫浩杰)¹, Ying-Jie Du(杜英杰)^1,2,†, and Ai-Hua Gao(高爱华)¹

1 School of Physics, Northwest University, Xi'an 710069, China;
2 Collaborative Innovation Center of Extreme Optics, Shanxi University, Taiyuan 030006, China

收稿日期:2023-06-19 修回日期:2023-10-23 接受日期:2023-10-24 出版日期:2023-10-16 发布日期:2023-11-03
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 and Quantum Optics Devices (Grant No. KF202209).

Absorption spectra and enhanced Kerr nonlinearity in a four-level system

Hao-Jie Huangfu(皇甫浩杰)¹, Ying-Jie Du(杜英杰)^1,2,†, and Ai-Hua Gao(高爱华)¹

1 School of Physics, Northwest University, Xi'an 710069, China;
2 Collaborative Innovation Center of Extreme Optics, Shanxi University, Taiyuan 030006, China

Received:2023-06-19 Revised:2023-10-23 Accepted:2023-10-24 Online:2023-10-16 Published:2023-11-03
Contact: Ying-Jie Du E-mail:yingjied@nwu.edu.cn
Supported by:
Project supported by the Open Subject of the State Key Laboratory of Quantum Optics and Quantum Optics Devices (Grant No. KF202209).

摘要/Abstract

摘要： In a coherent system, enhanced nonlinearity can be reached via far-detuned coupling fields in the presence of Autler-Townes splitting. We explore the absorption spectra and the Kerr nonlinearity of the coherent system via the interaction between a four-level atomic system and triple fields. We obtain the absorption spectra with double, triple and even quadruple peaks which depend on both the magnitude and the difference of the coupling fields. The Kerr nonlinearity always remains reversely correlated with the absorption spectra. We find that the large coupling detunings can lead to a significant growth of the Kerr nonlinearity and the degenerate four-wave mixing. Both the Kerr nonlinearity and the four-wave mixing can be managed by adjusting the detunings of the coupling fields.

关键词: double electromagnetically induced transparency (EIT), Autler-Townes splitting, Kerr nonlinearity, four-wave mixing

Abstract: In a coherent system, enhanced nonlinearity can be reached via far-detuned coupling fields in the presence of Autler-Townes splitting. We explore the absorption spectra and the Kerr nonlinearity of the coherent system via the interaction between a four-level atomic system and triple fields. We obtain the absorption spectra with double, triple and even quadruple peaks which depend on both the magnitude and the difference of the coupling fields. The Kerr nonlinearity always remains reversely correlated with the absorption spectra. We find that the large coupling detunings can lead to a significant growth of the Kerr nonlinearity and the degenerate four-wave mixing. Both the Kerr nonlinearity and the four-wave mixing can be managed by adjusting the detunings of the coupling fields.

Key words: double electromagnetically induced transparency (EIT), Autler-Townes splitting, Kerr nonlinearity, 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)

Hao-Jie Huangfu(皇甫浩杰), Ying-Jie Du(杜英杰), and Ai-Hua Gao(高爱华). Absorption spectra and enhanced Kerr nonlinearity in a four-level system[J]. 中国物理B, 2023, 32(11): 114214-114214.

Hao-Jie Huangfu(皇甫浩杰), Ying-Jie Du(杜英杰), and Ai-Hua Gao(高爱华). Absorption spectra and enhanced Kerr nonlinearity in a four-level system[J]. Chin. Phys. B, 2023, 32(11): 114214-114214.

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Absorption spectra and enhanced Kerr nonlinearity in a four-level system

Absorption spectra and enhanced Kerr nonlinearity in a four-level system

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