Theoretical Investigation of Optical Bistability and Multistability Via Spontaneously Generated Coherence in Four-Level Rydberg Atoms

Solookinejad, Ghahraman; Jabbari, Masoud; Nafar, Mehdi; Sangachin, E. Ahmadi; Asadpour, Seyyed Hossein

doi:10.1007/s10773-019-04002-0

Cited by 32 publications

(18 citation statements)

References 38 publications

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“…OB and OM in four-level atomic systems confined in a ring cavity has also been reported by many authors [26][27][28][29][30][31][32][33][34][35][36][37][38]. Due to the existence of many controlling parameters which cannot be found in a simple two-level or three-level atomic system, investigation on the OB and OM using four-level atomic media is easy to be carried out [33].…”

Section: Introductionmentioning

confidence: 73%

“…The higher value of cooperation parameter means higher number density of atoms in the ensemble; hence the ensemble exhibits greater interaction with the applied coherent fields [38]. The importance of this OM lies in the fact that this occurs at quite low values of the control and switching Rabi frequencies and without considering any additional coherence effect like SGC [33][34][35]. Figure 8(b) shows the variation of Im[ρ 21 ] as a function of the input field (|y|) [59,60].…”

Section: Numerical Results and Analysismentioning

confidence: 99%

“…The low threshold of OB obtained in this work is worth mentioning. The effect of SGC on the phase control of OB and OM in various fourlevel atomic systems has also been reported [33][34][35]. Hamedi et al have investigated the behavior of OB and OM in a fourlevel atomic system, involving a Rydberg state, illuminated by a probe field as well as control and switching laser beams of larger intensity [38].…”

Section: Introductionmentioning

confidence: 99%

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Controlling optical bistability, multistability and all-optical switching through multi-photon excitation process

Garain,

Mondal,

Mal

et al. 2023

J. Phys. B: At. Mol. Opt. Phys.

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We present a theoretical study on optical bistability (OB), optical multistability (OM) and tunable all-optical switching in a four-level cascade type atomic system. The density matrix formalism is used to find out the response of the probe laser field. We explore OB and OM under unidirectional optical ring cavity configuration. A comparison between the effects of electromagnetically induced transparency (EIT) and electromagnetically induced absorption (EIA) windows on OB is presented. The threshold of OB and the hysteresis width can be tuned effectively by adjusting the applied coherent fields. A transition from OB to OM and vice-versa can be easily achieved by tuning the field parameters and the atomic cooperation parameter. Dynamic control of the probe laser propagating through the medium has been investigated. We also demonstrate conversion of a continuous wave (cw) input probe field into output switched pulse. The ON/OFF time of the switched probe pulse can also be controlled by tuning the field parameters.

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Section: Introductionmentioning

confidence: 73%

Section: Numerical Results and Analysismentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Controlling optical bistability, multistability and all-optical switching through multi-photon excitation process

Garain,

Mondal,

Mal

et al. 2023

J. Phys. B: At. Mol. Opt. Phys.

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“…During the past few decades, a wide range of media have been thoroughly studied to investigate quantum nonlinear optical phenomena based on quantum coherence and interference effects [1,2]. Many potential applications in quantum information science have been discovered, including electromagnetically induced transparency (EIT) [3], enhanced Kerr nonlinearity [4], slow light propagation [5], four-wave mixing (FWM) [3,6], electromagnetically induced grating (EIG) [7], and others [8][9][10]. All of these areas have received significant research attention due to their potential benefits in alloptical systems based on EIT [11].…”

Section: Introductionmentioning

confidence: 99%

Three-dimensional control of the light propagation in a defect photonic crystal

Bravo A,

Aslla Q,

Huamán-Romaní

et al. 2023

Laser Phys.

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In this paper, we have proposed a new model for controlling the light propagation in a defect photonic crystal structure with a dispersive defect layer. The defect layer consists of a four-level quantum wells interacts by two optical vortex lights. Here, a weak signal light can be generated due to the four-wave mixing mechanism, and this led to phase dependent of the medium. By intensity modulations of the applied lights, we study the 3D properties of the transmitted, reflected and absorption spectrums of the incident light from defect photonic crystal. We have shown that via azimuthal modulations of the optical vortex light the incident light can be absorbed or amplified easily.

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“…One of the methods for optical switching at lowlight intensities is based on laser-induced atomic coherence and quantum interference. Optical switching has been extensively investigated in various systems [37,[43][44][45][46][47][48].…”

Section: Introductionmentioning

confidence: 99%

Spatio-temporal properties of pulse propagation in a graphene quantum system

Xiao¹

2021

Laser Phys.

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In this paper we have theoretically studied the spatial-temporal evolution of electromagnetic light propagation through a four-level graphene quantum system by using density matrix method and perturbation theory. The four-level graphene quantum medium interacted by an elliptical polarized coupling and a weak probe lights, respectively. We present the analytical solution for solving the Maxwell–Bloch equations for graphene and electromagnetic field in space and time domains. Then, we have analyzed the dynamic control of pulse propagation and optical dual switching in such a laser-driven quantum system. Our theoretical findings show that by adjusting the optical parameters such as elliptical angle i.e. phase difference between right-and-left circularly polarized, one can easily control the absorption spectrum and pulse propagation of the probe light in graphene medium. Our results may have potential applications in designing the new quantum devices for usage in quantum information processing.

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Theoretical Investigation of Optical Bistability and Multistability Via Spontaneously Generated Coherence in Four-Level Rydberg Atoms

Cited by 32 publications

References 38 publications

Controlling optical bistability, multistability and all-optical switching through multi-photon excitation process

Controlling optical bistability, multistability and all-optical switching through multi-photon excitation process

Three-dimensional control of the light propagation in a defect photonic crystal

Spatio-temporal properties of pulse propagation in a graphene quantum system

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