EIT Four-Level Lambda Scheme of Cold Rubidium Atoms

Brzostowski, B.; Long, Van Cao; Xuan, Khoa Dinh; Grabiec, B.; Ngoc, S. Vu; Żaba, A.

doi:10.12921/cmst.2010.si.02.13-16

Cited by 3 publications

(1 citation statement)

References 23 publications

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“…In addition, Ω s = 0.1γ while Ω c is the shaped pulse reported in table 1 of section 3.1. This atomic scheme can be experimentally realized by a Rb 87 atomic medium with the atomic states: [45]. It is worth noting that in such a dense medium, the polarization of neighboring atoms (molecules) generates an internal field at any given atom in addition to the average macroscopic fields, resulting in a total field at the atom that differs from the macroscopic field.…”

Section: The Refractive Indexmentioning

confidence: 99%

Controllable refractive index in a four-level left-handed medium using pulse shaping

Boutabba¹

2021

J. Opt.

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In this paper we control the negative refractive index of a four-level left-handed medium by applying different waveforms to excite the atomic system. The control field is a few-cycle strong pulse described by a double exponential function, and its modified forms, a Gaussian field, and a tan-hyperbolic pulse. The considered four-level system was fully analyzed in terms of the density matrix formalism under the rotating wave approximation, and the refractive index for various control fields was obtained. Hence, under specific conditions, the tunneling, and the modulation of the negative refractive index are achieved for various shaped waveforms. Such strong-shaped laser pulses open the way to fully control the system.

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Section: The Refractive Indexmentioning

confidence: 99%

Controllable refractive index in a four-level left-handed medium using pulse shaping

Boutabba¹

2021

J. Opt.

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Multipole solitons in a cold atomic gas with a parity-time symmetric potential

Cheng

Belić

et al. 2018

Nonlinear Dyn

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Double electromagnetically induced transparency in a four-level lambda atomic system with doppler broadening

Nguyen Thi Thu,

Nguyen Huy,

Le Van

et al. 2023

Comm. Phys.

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In this paper, we study the formation of two electromagnetically induced transparency (EIT) windows in a four-level lambda atomic system with Doppler broadening. The depth and the width of the EIT windows are easily changed by adjusting the intensity of the controlling laser fields. Meanwhile, the position of the EIT windows is also easily shifted by changing the frequency of the laser fields. In particular, by turning on or off one of the two coupling laser fields, the probe field response can be switched between one or two EIT window regimes, i.e., it is possible to switch between absorption and transparency regimes, and vice versa. In addition, our analytical model also allows one to investigate the influence of temperature (or Doppler width) on EIT windows, which is necessary for experimental observations as well as related applications at room temperature.

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EIT Four-Level Lambda Scheme of Cold Rubidium Atoms

Cited by 3 publications

References 23 publications

Controllable refractive index in a four-level left-handed medium using pulse shaping

Controllable refractive index in a four-level left-handed medium using pulse shaping

Multipole solitons in a cold atomic gas with a parity-time symmetric potential

Double electromagnetically induced transparency in a four-level lambda atomic system with doppler broadening

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