Slow, Stored and Stationary Light

Fleischhauer, Michael; Juzeliūnas, Gediminas

doi:10.1007/978-3-319-31903-2_15

Cited by 7 publications

(8 citation statements)

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“…In its simplest form EIT requires only three atomic levels and two light beams in a suitable atomic medium with configuration geometry of the Λ type [2,16,18]. In general, however, EIT is not restricted to this simple scheme, but takes place also in more complex atomic configurations where multiple energy states interact with multiple laser fields [19][20][21][22][23][24][25][26][27][28]. Such complex EIT systems possess a range of useful features, like multiple transparency windows, support of slow light at different frequencies, and the diversity in the optical response characteristics.…”

Section: Introductionmentioning

confidence: 99%

Azimuthal modulation of electromagnetically induced transparency using structured light

et al. 2018

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Recently a scheme has been proposed for detection of the structured light by measuring the transmission of a vortex beam through a cloud of cold rubidium atoms with energy levels of the Λ-type configuration [N. Radwell et al., Phys. Rev. Lett. 114, 123603 (2015)]. This enables observation of regions of spatially dependent electromagnetically induced transparency (EIT). Here we suggest another scenario for detection of the structured light by measuring the absorption profile of a weak nonvortex probe beam in a highly resonant five-level combined tripod and Λ (CTL) atomlight coupling setup. We demonstrate that due to the closed-loop structure of CTL scheme, the absorption of the probe beam depends on the azimuthal angle and orbital angular momentum (OAM) of the control vortex beams. This feature is missing in simple Λ or tripod schemes, as there is no loop in such atom-light couplings. One can identify different regions of spatially structured transparency through measuring the absorption of probe field under different configurations of structured control light.

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Section: Introductionmentioning

confidence: 99%

Azimuthal modulation of electromagnetically induced transparency using structured light

et al. 2018

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“…An EIT medium can be very dispersive resulting in a slowly propagating beam of the electromagnetic radiation. The slow light [9][10][11][12][13], forming due to the EIT can greatly enhance the atom-light interaction resulting in a number of distinctive optical phenomena [14][15][16][17][18][19][20].…”

Section: Introductionmentioning

confidence: 99%

Exchange of optical vortices using an electromagnetically-induced-transparency–based four-wave-mixing setup

2018

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We propose a scheme to exchange optical vortices of slow light using the phenomenon of electromagnetically induced transparency (EIT) in a four-level double-Λ atom-light coupling scheme illuminated by a pair of probe fields as well as two control fields of larger intensity. We study the light-matter interaction under the situation where one control field carries an optical vortex, and another control field has no vortex. We show that the orbital angular momentum (OAM) of the vortex control beam can be transferred to a generated probe field through a four-wave mixing (FWM) process and without switching on and off of the control fields. Such a mechanism of OAM transfer is much simpler than in a double-tripod scheme in which the exchange of vortices is possible only when two control fields carry optical vortices of opposite helicity. The losses appearing during such OAM exchange are then calculated. It is found that the one-photon detuning plays an important role in minimizing the losses. An approximate analytical expression is obtained for the optimal one-photon detuning for which the losses are minimum while the intensity of generated probe field is maximum. The influence of phase mismatch on the exchange of optical vortices is also investigated. We show that in presence of phase mismatch the exchange of optical vortices can still be efficient.

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Section: Introductionmentioning

confidence: 99%

“…Electromagnetically induced transparency (EIT) [1][2][3][4][5][6] plays an important role in controlling the propagation of light pulses in resonant media. Due to the EIT a weak probe beam of light tuned to an atomic resonance can propagate slowly and is almost lossless when the medium is driven by one or several control beams of light with a higher intensity [1][2][3][4][5][6]. The EIT is formed because the control and probe beams drive the atoms to their dark states representing a special superposition of the atomic ground states immune to the atom-light coupling.…”

Section: Introductionmentioning

confidence: 99%

“…There has been a considerable amount of activities on single- [2-4, 8, 11, 12, 39-43] and two-component (spinor) [6,[44][45][46][47][48] slow light in atomic media induced by the EIT. The former single-component slow light involves a probe beam of light and one or several control beams resonantly interacting with atomic media characterized by three level Lambda (Λ) type [2,40] or four level tripod type [41,42,[49][50][51] atom-light coupling schemes.…”

Section: Introductionmentioning

confidence: 99%

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Electromagnetically induced transparency and nonlinear pulse propagation in a combined tripod and Λ atom-light coupling scheme

Hamedi

Ruseckas

Juzeliūnas

2017

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

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Abstract. We consider propagation of a probe pulse in an atomic medium characterized by a combined tripod and Lambda (Λ) atom-light coupling scheme. The scheme involves three atomic ground states coupled to two excited states by five light fields. It is demonstrated that dark states can be formed for such an atomlight coupling. This is essential for formation of the electromagnetically induced transparency (EIT) and slow light. In the limiting cases the scheme reduces to conventional Λ-or N -type atom-light couplings providing the EIT or absorption, respectively. Thus the atomic system can experience a transition from the EIT to the absorption by changing the amplitudes or phases of control lasers. Subsequently the scheme is employed to analyze the nonlinear pulse propagation using the coupled Maxwell-Bloch equations. It is shown that generation of stable slow light optical solitons is possible in such a five-level combined tripod and Λ atomic system.

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Slow, Stored and Stationary Light

Cited by 7 publications

References 50 publications

Azimuthal modulation of electromagnetically induced transparency using structured light

Azimuthal modulation of electromagnetically induced transparency using structured light

Exchange of optical vortices using an electromagnetically-induced-transparency–based four-wave-mixing setup

Electromagnetically induced transparency and nonlinear pulse propagation in a combined tripod and Λ atom-light coupling scheme

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