Propagation of a laser pulse in a three-level cascade atomic medium under conditions of electromagnetically induced transparency

Bang, Nguyen Huy; Hoang, Minh Dong; Le, Van Doai; Vu, Ngoc Sau; Dinh, Xuan Khoa

doi:10.4302/plp.2016.3.05

Cited by 3 publications

(2 citation statements)

References 17 publications

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“…Recently, there has been a significant trend in the research interest of scientists to multilevel atomic systems related to quantum coherence phenomena [4]. Especially with the advent of the electromagnetically induced transparency (EIT) effect [5,6] has created many new phenomena such as lasing without population inversion [7], enhancement of Kerr nonlinearity [8][9][10][11], ultraslow light propagation [12][13][14][15][16][17], OB and all-optical switching [18][19][20][21][22][23]. Therefore, OB and optical multistability (OM) behaviors in multilevel systems have also been studied theoretically and experimentally [24][25][26][27][28][29][30][31][32][33][34][35][36][37][38].…”

Section: Introductionmentioning

confidence: 99%

External magnetic field-assisted polarization-dependent optical bistability and multistability in a degenerate two-level EIT medium

Tuan¹,

Thu²,

Doan³

et al. 2023

Laser Phys. Lett.

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In this paper, a novel degenerate two-level model is proposed to study the behavior of optical bistability (OB) and optical multistability (OM) under the effect of the magnetic field and relative phase. We show that the behavior of the OB can appear in the resonant regime by changing the strength of the external magnetic field. Especially, the result has shown that it is possible to easily convert between OB and OM by adjusting the strength of the external magnetic field or coupling field in the presence of the relative phase. In addition, the influence of the probe detuning and the atomic cooperation parameter on the OB behavior have also been considered. The studied results may be helpful for optical communication applications in optical switching processing and optimization.

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Section: Introductionmentioning

confidence: 99%

External magnetic field-assisted polarization-dependent optical bistability and multistability in a degenerate two-level EIT medium

Tuan¹,

Thu²,

Doan³

et al. 2023

Laser Phys. Lett.

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“…Therefore, EIT can enhance significantly the interaction time between light and matter or enhance nonlinear optical processes in the vicinity of atomic resonant frequencies [15][16][17], which may achieve high efficiency even at the single-photon level [18,19]. EIT can also modify the propagation dynamics of light pulses, such as the formation and propagation of optical solitons [20][21][22][23][24][25][26][27][28].…”

Section: Introductionmentioning

confidence: 99%

Controllable optical switching in a closed-loop three-level lambda system

Dong

Nguyen

2019

Phys. Scr.

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We propose a model for optical switching in a closed-loop three-level lambda atomic system excited by two optical fields, coupling and probe lights, and by a microwave-driven field. A set of coupled Maxwell-Bloch equations for the atom-field system is numerically solved with a combination of the Runge-Kutta and finite difference techniques. It is shown that the transmitted probe light can be switched to a nearly square pulse train by switching the relative phase of the interacting fields or by switching the intensity of the microwave field. Furthermore, the switching mode between the probe field and relative phase can be anti-synchronous or synchronous, depending on the relative phase being modulated to π/2 and 3π/2 or π and 2π, respectively. Also, the efficiency and the switching rate can be controlled by the microwave field, the relative phase and the intensity of the coupling field. Such a controllable optical switching model can be applied in the design of optical switching and amplification devices working at low light intensities.

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STUDY OF NEGATIVE REFRACTIVE INDEX IN Rb FOUR-LEVEL N-TYPE ATOMIC GAS MEDIUM

Nguyen

et al. 2022

DLU JOS

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In this work, we study the generation of a negative refractive index based on electromagnetically induced transparency (EIT) in a Rb four-level N-type atomic gas medium. We derive analytic expressions for the relative permittivity and relative permeability of the medium according to the parameters of the probe, pump, and signal laser fields. We then investigate the variation of the real parts of the relative permittivity and relative permeability with respect to the intensity and frequency of the pump and signal laser fields. In the presence of the pump laser beam, the medium becomes transparent to the probe laser beam even in the resonant region. At the same time, the real parts of the relative permittivity and relative permeability are simultaneously negative (i.e., the medium exhibits a negative refractive index) in the EIT spectral domain. In the presence of the signal laser beam, the EIT effect occurs over two different frequency domains of the probe beam, so a negative refractive index is also generated in these two frequency domains. The investigation of the real parts of the relative permittivity and relative permeability with intensity and frequency of the pump and signal laser fields allowed us to find the laser parameters for the appearance of the negative refractive index, which can be useful for experimental observations.

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Propagation of a laser pulse in a three-level cascade atomic medium under conditions of electromagnetically induced transparency

Cited by 3 publications

References 17 publications

External magnetic field-assisted polarization-dependent optical bistability and multistability in a degenerate two-level EIT medium

External magnetic field-assisted polarization-dependent optical bistability and multistability in a degenerate two-level EIT medium

Controllable optical switching in a closed-loop three-level lambda system

STUDY OF NEGATIVE REFRACTIVE INDEX IN Rb FOUR-LEVEL N-TYPE ATOMIC GAS MEDIUM

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