Coherent control of narrow structures in absorption, transparency and dispersion by interference induced among the Rabi-split resonances

Dutta, Bibhas Kumar

doi:10.1016/j.physleta.2013.05.042

Cited by 6 publications

(7 citation statements)

References 58 publications

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“…The results are in good agreement with Fig. 2 of [14]. Note that the position of four peaks can be determined by the four eigenvalues of the system, which have been introduced in Equation (5).…”

Section: Resultssupporting

confidence: 87%

“…Parameters used are R 1 = R 2 = 0.5γ, R m = 10γ, Δ p = 0.001γ, Δ m = Δ 1 = Δ 2 = 0, k 1 = 0.9k, k 2 = k, φ = 0, (a) R p = 0.01γ, (b) C = 200, kx = 0 (solid), 0.21 (dashed), 3.59 (dash-dotted). The characteristic and location of absorption peaks depend on the Rabi frequency and detuning of applied fields [14]. It can be seen that for kx = 0 (solid), the system does not show bistable behavior.…”

Section: Resultsmentioning

confidence: 99%

“…On the other hand, the optical properties of a triply driven five-level atomic system have been investigated, and the coherent control of narrow structures in absorption and dispersion was reported [14]. In this paper, we study the OB and OM behaviors of such a system, and it is shown that the OB behavior can be controlled by intensity of applied fields.…”

Section: Introductionmentioning

confidence: 96%

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Controlling the Optical Bistability and Multistability via Atom Localization

Moghannian¹,

Vafafard²,

Mahmoudi³

2016

PIER M

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We investigate optical bistability (OB) and optical multistability (OM) behaviors in a triply driven five-level atomic system. It is shown that the system has bistable behavior and can be controlled by intensity of applied fields. We find that OB switches to OM via interference induced among the Rabi-split resonance. We consider a superposed one-dimension standing wave, generated by two optical fields, and it is demonstrated that the OB and OM behaviors depend on the position of localized atoms as well as the relative phase of applied fields.

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Section: Resultssupporting

confidence: 87%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 96%

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Controlling the Optical Bistability and Multistability via Atom Localization

Moghannian¹,

Vafafard²,

Mahmoudi³

2016

PIER M

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“…The highest theoretical localization degrees have been demonstrated in schemes that rely on measuring either spontaneous emission [10][11][12] or a level population [13,14] of an atom moving through a resonant standing wave.In general, as a proof-of-principle, one-dimensional systems have been very popular, see e.g. the recent studies [15][16][17][18][19][20]. Studies of atomic systems in two dimensions have also been numerous recently [21][22][23][24][25][26][27][28][29][30][31][32].…”

mentioning

confidence: 99%

“…In general, as a proof-of-principle, one-dimensional systems have been very popular, see e.g. the recent studies [15][16][17][18][19][20]. Studies of atomic systems in two dimensions have also been numerous recently [21][22][23][24][25][26][27][28][29][30][31][32].…”

mentioning

confidence: 99%

Three-dimensional atom localization by laser fields in a four-level tripod system

2014

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We present a scheme of the high-precise three-dimensional (3D) localization by the measurement of the atomic-level population. The scheme is applied to a four-level tripod-type atom coupled by three strong standing waves and a probe running wave. As a result, the atom can be localized in volumes that are substantially smaller than a cubic optical wavelength. The upper-level distribution depends crucially on the atom-field coupling and it forms 3D periodic structures composed of spheres, hourglasses, bowls, donuts, or deformed barrels.PACS numbers: 42.50. Gy, 42.50.Nn, 42.50.Wk, 42.50.St The concept of Heisenberg microscope [1] demonstrates that atoms can not be localized using light within the optical half-wavelength unless one takes advantage of the internal structure of atoms. One approach is to obtain spatially changing structures in level populations in a cloud of atoms. Motivated e.g. by possible applications in atomic nanolithography [2], different methods for going beyond this limit have been proposed over the years, including the measurement of the atomic resonance frequency [3][4][5], the phase shift [6][7][8], or the atomic dipole [9]. The highest theoretical localization degrees have been demonstrated in schemes that rely on measuring either spontaneous emission [10][11][12] or a level population [13,14] of an atom moving through a resonant standing wave.In general, as a proof-of-principle, one-dimensional systems have been very popular, see e.g. the recent studies [15][16][17][18][19][20]. Studies of atomic systems in two dimensions have also been numerous recently [21][22][23][24][25][26][27][28][29][30][31][32]. It is important to note that in 2D, one can obtain, in addition to mere subwavelength localization, further spatial structuring of the atomic locations, see e.g. [33]. A key question is whether localization and structuring can be obtained also in 3D, and what kind of structures can appear. Possible applications may include high-precision position-dependent chemistry without a real change in the atomic distribution, combining state-selective localization with state-selective chemical reactions. In addition, 3D structuring produces a wide variety of practical realizations of such chemical reactions, demonstrating the necessity of reliable methods for the prediction of localization structures. For any realistic scheme one needs to carefully consider the atomic structure and to include spontaneous emission. Previously 3D localization has been discussed in a five-level system without taking the geometry of the atomic dipole coupling into account [34]. We show that 3D localization is realistically possible with only four atomic levels in a tripod scheme, and that one obtains interesting structures around points of localization by simple tuning of the parameters of the localizing fields.We consider the 87 Rb D 2 line (the 5 2 S 1/2 → 5 2 P 3/2 transition), which is only thought as a possible example of tripod system with three ground states |F = 1, m F (m F = −1, 0, 1) and upper state |F = 0, m...

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Coherent control via interplay between driving field and two-body interaction in a double well

2013

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We investigate interplay between external field and interatomic interaction and its applications to coherent control of quantum tunneling for two repulsive bosons confined in a high-frequency driven double well. A full solution of the system is generated analytically as a coherent non-Floquet state by using the Floquet states as a set of complete bases. It is demonstrated that the photon resonance of interaction leads to translation of the Floquet level-crossing points, and the non-resonant interaction causes avoided crossing of partial levels. In the non-Floquet states, the bosons beyond the crossing points slowly vary their populations, and the resonant (non-resonant) interactions enhance (decrease) the tunneling rate of the paired particles. Three different kinds of the coherent destructions of tunneling (CDT) at the crossing, avoided-crossing and uncrossing points, and the corresponding stationary-like states, are illustrated. The analytical results are numerically confirmed and perfect agreements are found. Based on the results, an useful scheme of quantum tunneling switch between stationary-like states is presented.

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Coherent control of narrow structures in absorption, transparency and dispersion by interference induced among the Rabi-split resonances

Cited by 6 publications

References 58 publications

Controlling the Optical Bistability and Multistability via Atom Localization

Controlling the Optical Bistability and Multistability via Atom Localization

Three-dimensional atom localization by laser fields in a four-level tripod system

Coherent control via interplay between driving field and two-body interaction in a double well

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