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Left-Handedness in a Four-Level Atomic System: Quantum Coherence, Electromagnetically Induced Transparency and Negative Refraction

Ijaz Durrani

Jan 1, 20260 citations

Effect of spontaneously generated coherence in controlling the optical bistability and multistability in a left-handed four-level atomic system

Akbar Jafari, Rahim Naderali, S. Bakkeshizadeh

Optical and Quantum ElectronicsDec 21, 20154 citations

Electromagnetically induced negative refractive index in a V-type four-level atomic system

张红军, 钮月萍, 龚尚庆

We propose a scheme for realizing negative refractive index in a V-type four-level atomic system. It is shown that the negative refractive index can be achieved in a wide frequency band based on the effect of quantum coherence. It is also found that the frequency band of negative refractive index and the absorption property of left-handed material are manipulated by the pump and control fields. Furthermore, left-handed material with reduced absorption is possible by choosing appropriate parameters. (c) 2006 Elsevier B.V. All rights reserved.We propose a scheme for realizing negative refractive index in a V-type four-level atomic system. It is shown that the negative refractive index can be achieved in a wide frequency band based on the effect of quantum coherence. It is also found that the frequency band of negative refractive index and the absorption property of left-handed material are manipulated by the pump and control fields. Furthermore, left-handed material with reduced absorption is possible by choosing appropriate parameters. (c) 2006 Elsevier B.V. All rights reserved.

Jan 1, 20070 citations

Zero absorption and a large negative refractive index in a left-handed four-level atomic medium

Shun‐Cai Zhao, Zhengdong Liu, Qixuan Wu

In this paper, we have investigated three external fields interacting with the four-level atomic system described by the density-matrix approach. The atomic system exhibits left-handedness with zero absorption and large negative refractive index. Varying the parameters of the three external fields, the properties of zero absorption and large negative refractive index from the atomic system remain unvarying. Our scheme proposes an approach to obtain a negative refractive medium with zero absorption. The zero absorption property of the atomic system may be used to amplify the evanescent waves that have been lost in the imaging by traditional lenses, and a slab fabricated by the left-handed atomic system may be an ideal candidate for designing perfect lenses.In this paper, we have investigated three external fields interacting with the four-level atomic system described by the density-matrix approach. The atomic system exhibits left-handedness with zero absorption and large negative refractive index. Varying the parameters of the three external fields, the properties of zero absorption and large negative refractive index from the atomic system remain unvarying. Our scheme proposes an approach to obtain a negative refractive medium with zero absorption. The zero absorption property of the atomic system may be used to amplify the evanescent waves that have been lost in the imaging by traditional lenses, and a slab fabricated by the left-handed atomic system may be an ideal candidate for designing perfect lenses.

arXiv:2403.00042Journal of Physics B Atomic Molecular and Optical PhysicsJan 28, 201021 citations

Electromagnetically induced negative refraction in an atomic system with spontaneously generated coherence

Nuo Ba, Jin-Wei Gao, Wei Fan +4 more

Optics CommunicationsAug 25, 200811 citations

Dual bands of negative refraction with low absorption in a quasi-Λ four-level left-handed atomic system

Xiaoyu Yang, Yongyuan Jiang

Dual bands of left-handedness are obtained in a quasi- four-level atomic system. In our system, multichannel quantum interference plays a very important role on the realization of dual bands. It is shown that the permeability can realize negative values in dual bands of this four-level atomic system. Moreover, the permittivity and permeability can simultaneously realize negative values in the same frequency band. It can be found that the atomic system exhibits negative refraction with low absorption in each left-handed frequency band. At some certain frequencies, this left-handed atomic system can obtain zero absorption.Dual bands of left-handedness are obtained in a quasi- four-level atomic system. In our system, multichannel quantum interference plays a very important role on the realization of dual bands. It is shown that the permeability can realize negative values in dual bands of this four-level atomic system. Moreover, the permittivity and permeability can simultaneously realize negative values in the same frequency band. It can be found that the atomic system exhibits negative refraction with low absorption in each left-handed frequency band. At some certain frequencies, this left-handed atomic system can obtain zero absorption.

Journal of Modern OpticsSep 1, 20130 citations

Negative refraction without absorption via both coherent and incoherent fields in a four-level left-handed atomic system

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Negative refraction without absorption via both coherent and incoherent fields in a four-level left-handed atomic system

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