Amplified Nonreciprocal Reflection in a Uniform Atomic Medium with the Help of Spontaneous Emissions

Lin, Xinyu; Zheng, Xinfu; Geng, Yue; Li, Guanrong; Xu, Qiongyi; Wu, Jinhui; Yan, Dong; Yang, Hong

doi:10.3390/photonics11040389

Open AccessArticle

Amplified Nonreciprocal Reflection in a Uniform Atomic Medium with the Help of Spontaneous Emissions

by

Xinyu Lin

¹,

Xinfu Zheng

¹,

Yue Geng

¹,

Guanrong Li

¹,

Qiongyi Xu

¹,

Jinhui Wu

²,

Dong Yan

^1,*

and

Hong Yang

^1,*

¹

School of Physics and Electronic Engineering, Hainan Normal University, Haikou 571158, China

²

Center for Quantum Sciences and School of Physics, Northeast Normal University, Changchun 130024, China

^*

Authors to whom correspondence should be addressed.

Photonics 2024, 11(4), 389; https://doi.org/10.3390/photonics11040389

Submission received: 22 March 2024 / Revised: 15 April 2024 / Accepted: 18 April 2024 / Published: 22 April 2024

(This article belongs to the Special Issue Optical Quantum System)

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Abstract

It is important to elaborate on versatile strategies for achieving the perfect nonreciprocal reflection amplification, which is the key technology of high-quality nonreciprocal photonic devices. In this work, we ingeniously design a coherent four-level N-type atomic system to harness the nonreciprocal light amplification, in which the uniform distribution of atoms is driven by two strong coupling fields and a weak probe field. In our regime, the strength of the two control fields is designed with linear variation along the x direction to destroy the spatial symmetry of the probe susceptibility, leading to the nonreciprocity of the reflection. In particular, the closed-loop transitions to amplify the probe field are due to the combined effect of the control fields and spontaneous emissions. The numerical simulation indicates that the perfect nonreciprocal reflection amplification can be realized and modulated by the appropriate settings of the control fields and the detuning,

Δ_{c}

. Our results will open a new route toward harnessing nonreciprocity, which can provide more convenience and possibilities in experimental realization.

Keywords: nonreciprocal reflection amplification; spontaneous emission; symmetry breaking

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MDPI and ACS Style

Lin, X.; Zheng, X.; Geng, Y.; Li, G.; Xu, Q.; Wu, J.; Yan, D.; Yang, H. Amplified Nonreciprocal Reflection in a Uniform Atomic Medium with the Help of Spontaneous Emissions. Photonics 2024, 11, 389. https://doi.org/10.3390/photonics11040389

AMA Style

Lin X, Zheng X, Geng Y, Li G, Xu Q, Wu J, Yan D, Yang H. Amplified Nonreciprocal Reflection in a Uniform Atomic Medium with the Help of Spontaneous Emissions. Photonics. 2024; 11(4):389. https://doi.org/10.3390/photonics11040389

Chicago/Turabian Style

Lin, Xinyu, Xinfu Zheng, Yue Geng, Guanrong Li, Qiongyi Xu, Jinhui Wu, Dong Yan, and Hong Yang. 2024. "Amplified Nonreciprocal Reflection in a Uniform Atomic Medium with the Help of Spontaneous Emissions" Photonics 11, no. 4: 389. https://doi.org/10.3390/photonics11040389

APA Style

Lin, X., Zheng, X., Geng, Y., Li, G., Xu, Q., Wu, J., Yan, D., & Yang, H. (2024). Amplified Nonreciprocal Reflection in a Uniform Atomic Medium with the Help of Spontaneous Emissions. Photonics, 11(4), 389. https://doi.org/10.3390/photonics11040389

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Amplified Nonreciprocal Reflection in a Uniform Atomic Medium with the Help of Spontaneous Emissions

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