Narrowing of resonances in electromagnetically induced transparency and absorption using a Laguerre–Gaussian control beam

Chanu, Sapam Ranjita; Natarajan, Vasant

doi:10.1016/j.optcom.2013.01.042

Cited by 27 publications

(14 citation statements)

References 24 publications

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“…For all curves, we assume the control Rabi frequency constant to be Ω 0c,kl = 20 MHz, the control laser linewidth to be γ c = 1 MHz, the probe laser linewidth to be γ p = 0.1 MHz, the number density to be N = 5 × 10 10 cm −3 , and the control laser detuning to be ∆ c = 0. Our model agrees with previous results [29] that for control lasers with equal Ω 0c,kl , EIT involving a control laser in the LG 1 0 mode results in a narrowing of the resonance feature.…”

Section: Theoretical Modelsupporting

confidence: 92%

“…Then, the control laser power can be increased, improving the signal. Previously, sub-natural linewidths were observed in the EIT transmission spectra using an LG 1 0 control beam in room temperature gases [28,29]. Remarkably, the LG 1 0 control laser reduced the EIT linewidth by a factor of 2 as compared to a similar experiment with the control in a Gaussian mode.…”

Section: Introductionmentioning

confidence: 83%

“…These constants are used to compare different configurations of LG 1 0 and Gaussian control beams to be consistent with refs. [28,29]. To verify the pane-wave approximation for the Gaussian modes, we evaluated our model with the inclusion of the Gaussian spatial variation.…”

Section: Theoretical Modelmentioning

confidence: 99%

“…It was proposed in ref. [29] that the OAM of the control beam could decrease the decoherences due to transit effects of the room temperature gas. However, they show that increasing OAM does not increase the narrowing and argue that the reduction in EIT linewidth is due entirely to the spatial dependence of the control Rabi frequency.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Electromagnetically induced transparency with Laguerre–Gaussian modes in ultracold rubidium

Akin

Krzyzewski

Marino

et al. 2015

Optics Communications

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We demonstrate electromagnetically induced transparency with the control laser in a Laguerre-Gaussian mode. The transmission spectrum is studied in an ultracold gas for the D2 line in both 85 Rb and 87 Rb, where the decoherence due to diffusion of the atomic medium is negligible. We compare these results to a similar configuration, but with the control laser in the fundamental laser mode. We model the transmission of a probe laser under both configurations, and we find good agreement with the experiment. We conclude that the use of Laguerre-Gaussian modes in electromagnetically induced transparency results in narrower resonance linewidths as compared to uniform control laser intensity. The narrowing of the linewidth is caused by the spatial distribution of the Laguerre-Gaussian intensity profile.

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Section: Theoretical Modelsupporting

confidence: 92%

Section: Introductionmentioning

confidence: 83%

Section: Theoretical Modelmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Electromagnetically induced transparency with Laguerre–Gaussian modes in ultracold rubidium

Akin

Krzyzewski

Marino

et al. 2015

Optics Communications

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“…An optical vortex is a beam with nonzero orbital angular momentum (OAM), meaning that its optical phase is a function of azimuthal coordinate and the wavefront is helical [32,33]. Some important features of OAM in the EIT regime have been demonstrated including resonance narrowing [34] or the robustness of stored OAM state to decoherence [35], suggesting vortex usability in the EIT-related applications. Moreover, OAM serves as an additional degree of freedom for a photon and hence represents a system of a higher dimension for the high capacity information transmission.…”

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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A theoretical analysis on quantum memory parameters in ultracold $$^{87}$$Rb and $$^{133}$$Cs alkali species using EIT protocol in the presence of structured light

Manchaiah

Kumar

Easwaran

2022

Quantum Inf Process

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Narrowing of resonances in electromagnetically induced transparency and absorption using a Laguerre–Gaussian control beam

Cited by 27 publications

References 24 publications

Electromagnetically induced transparency with Laguerre–Gaussian modes in ultracold rubidium

Electromagnetically induced transparency with Laguerre–Gaussian modes in ultracold rubidium

Azimuthal modulation of electromagnetically induced transparency using structured light

A theoretical analysis on quantum memory parameters in ultracold $$^{87}$$Rb and $$^{133}$$Cs alkali species using EIT protocol in the presence of structured light

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