Hanle electromagnetically induced transparency and absorption resonances with a Laguerre Gaussian beam

Anupriya, J; Ram, Nibedita; Pattabiraman, M.

doi:10.1103/physreva.81.043804

Cited by 44 publications

(34 citation statements)

References 30 publications

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“…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%

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 Modelmentioning

confidence: 99%

Electromagnetically induced transparency with Laguerre–Gaussian modes in ultracold rubidium

Akin

Krzyzewski

Marino

et al. 2015

Optics Communications

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“…showed that the Laguerre-Gaussian (LG) laser mode has a well-defined OAM, as per photon, and proposed an experiment to observe the torque on cylindrical lenses arising from the reversal of the helicity of a LG mode 10 . An additional motivation for recent studies of LG beams is as a route to obtain narrower electromagnetically induced transparency (EIT) spectrum than the conventional Gaussian one 11 – 13 . The transmission of structured light has been measured using the phase profile in cold rubidium atoms and been shown that the EIT is spatially dependent for vortex light beams 14 .…”

Section: Introductionmentioning

confidence: 99%

Spatially dependent atom-photon entanglement

Sabegh

Amiri

Mahmoudi

2018

Sci Rep

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The atom-photon entanglement using the Laguerre-Gaussian (LG) beams is studied in the closed-loop three-level V-type quantum systems. We consider two schemes with near-degenerate and non-degenerate upper levels: in the first, the effect of the quantum interference due to the spontaneous emission is taken into account and in the second, a microwave plane wave is applied to the upper levels transition. It is shown that the atom-photon entanglement in both schemes depends on the intensity profile as well as the orbital angular momentum (OAM) of the applied fields so that the various spatially dependent entanglement patterns can be generated by Laguerre-Gaussian beams with different OAMs. However, due to the zero intensity,no entanglement appears in the center of the optical vortex beams. As a result, the entanglement between dressed atom and its spontaneous emissions in different points of the atomic vapor cell can be controlled by the OAM of the applied fields. Moreover, our numerical results show that the number of the local maximum degree of entanglement (DEM) peaks depends on the OAM of the applied fields. The degrees of freedom for OAM play a crucial role in spatially dependent atom-photon entanglement in such a way that it may possess broad applications in high-dimensional quantum information processing and data storage.

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“…Recent experiments have shown effects of different laser modes i.e. a Laguerre-Gaussian laser beam gave narrower EIT than a Gaussian laser beam [27]. In buffer gas cells, filled with a mixture of alkali atoms and inert gas at several Torr, EIT line-shapes are influenced by diffusion of the alkali atoms in and out of a laser beam.…”

Section: Introductionmentioning

confidence: 99%

Influence of a laser beam radial intensity distribution on Zeeman electromagnetically induced transparency line-shapes in the vacuum Rb cell

Ćuk¹,

Krmpot²,

Radonjić³

et al. 2013

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

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Experimental and theoretical analyses show the effect of laser beam radial intensity distribution on line-shapes and line-widths of the electromagnetically induced transparency (EIT). We used Gaussian and (flat top) laser beam profiles, coupling the D 1 transition of 87 Rb atoms in the vacuum cell in the Hanle experimental configuration. We obtained non-Lorentzian EIT line-shapes for a Gaussian laser beam, while line-shapes for a laser beam profile are very well approximated with Lorentzian. EIT line-widths, lower for Gaussian than for , show nonlinear dependence on laser intensity for both laser beam profiles. EIT amplitudes have similar values and dependence on laser intensity for both laser beams, showing the maximum at around 0.8 mW cm −2. Differences between the EIT line-shapes for the two profiles are mainly due to distinct physical processes governing atomic evolution in the rim of the laser beam, as suggested from the EIT obtained from the various segments of the laser beam cross-section.

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Hanle electromagnetically induced transparency and absorption resonances with a Laguerre Gaussian beam

Cited by 44 publications

References 30 publications

Electromagnetically induced transparency with Laguerre–Gaussian modes in ultracold rubidium

Electromagnetically induced transparency with Laguerre–Gaussian modes in ultracold rubidium

Spatially dependent atom-photon entanglement

Influence of a laser beam radial intensity distribution on Zeeman electromagnetically induced transparency line-shapes in the vacuum Rb cell

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