Microwave dressing of Rydberg dark states

Танаситтикосол, Монсит; Pritchard, Jonathan D.; Maxwell, D.; Gauguet, Alexandre; Weatherill, Kevin J.; Potvliege, R. M.; Adams, Charles S.

doi:10.1088/0953-4075/44/18/184020

Cited by 116 publications

(74 citation statements)

References 37 publications

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“…In contrast to the sharp increase in resonant transmission that characterises EIT, these effects are identified by a resonant transmission that can be decreased by the presence of additional control fields. A concomitant change in sign of dispersion can be used to switch between subluminal and superluminal light propagation [9][10][11][12]. Early work on EIA focussed on Zeeman-degenerate systems, where the interpretations of the phenomenon relied upon transfer of coherence [13][14][15] or population [16], with a minimum of four levels.…”

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Electromagnetically induced absorption in a nondegenerate three-level ladder system

et al. 2015

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We investigate, theoretically and experimentally, the transmission of light through a thermal vapour of three-level ladder-type atoms, in the presence of 2 counter-propagating control fields. A simple theoretical model predicts the presence of electromagnetically induced absorption (EIA) in this pure three-level system when the control field is resonant. Experimentally, we use 87 Rb in a large magnetic field of 0.62 T to reach the hyperfine Paschen-Back regime and realise a non-degenerate three-level system. Experimental observations verify the predictions over a wide range of detunings.The study of coherent phenomena in driven multi-level atomic systems is an active area of research [1]. Threelevel atoms driven by two applied fields display a variety of effects, including electromagnetically induced transparency (EIT) [2] and coherent population trapping [3]. By adding further fields and states, different phenomena have been observed such as the appearance of electromagnetically induced gratings/Bragg reflection [4][5][6] and electromagnetically induced absorption (EIA) [7,8]. In contrast to the sharp increase in resonant transmission that characterises EIT, these effects are identified by a resonant transmission that can be decreased by the presence of additional control fields. A concomitant change in sign of dispersion can be used to switch between subluminal and superluminal light propagation [9][10][11][12]. Early work on EIA focussed on Zeeman-degenerate systems, where the interpretations of the phenomenon relied upon transfer of coherence [13][14][15] or population [16], with a minimum of four levels. More recently, EIA has been observed in a degenerate lambda system [17] and also in a four-level N -system [18], even when the degeneracy is lifted by applying a small magnetic field. The effects of thermal motion have also been investigated [19].Here we present the first experimental observation of EIA in a non-degenerate three-level ladder system. In a thermal 87 Rb vapour, the degeneracy is lifted by a strong magnetic field, in which the atoms enter the hyperfine Paschen-Back regime [20][21][22] where all transitions are separated in frequency by more than the Doppler width. EIA is observed by detecting the transmission of a weak probe beam [23] through the atomic vapor which is dressed by both co-and counter-propagating control beams. The control beams have the same optical frequency and are resonant with an excited-state transition forming a ladder system similar to standard EIT configurations [24]. A model based on [25] reproduces the experimental results and highlights the prominent role of fast atoms.The richness of this system comes from multi-photon resonances involving both control beams, that can occur for moving atoms. In the rest frame of an atom moving with velocity v, the two control fields of wavenumber k c * daniel.whiting@durham.ac.uk For even numbers of control photons (ii) we can form resonances between states |1 and |2 forThe interaction between these resonances and the main two-level ...

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Electromagnetically induced absorption in a nondegenerate three-level ladder system

et al. 2015

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“…The theoretical fit curves in Figs. 3(d)-3(f) are calculated by averaging over all magnetic sublevels [20].…”

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Three-photon electromagnetically induced transparency using Rydberg states

et al. 2012

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(2012) 'Three-photon electromagnetically induced transparency using Rydberg states.', Optics letters., 37 (18). pp. 3858-3860.Further information on publisher's website:http://www.opticsinfobase.org/ol/abstract.cfm? Publisher's copyright statement: c 2012 The Optical Society. This paper was published in Applied optics and is made available as an electronic reprint with the permission of OSA. The paper can be found at the following URL on the OSA website:http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-37-18-3858. Systematic or multiple reproduction or distribution to multiple locations via electronic or other means is prohibited and is subject to penalties under law. Additional information:Use policyThe full-text may be used and/or reproduced, and given to third parties in any format or medium, without prior permission or charge, for personal research or study, educational, or not-for-prot purposes provided that:• a full bibliographic reference is made to the original source • a link is made to the metadata record in DRO • the full-text is not changed in any way The full-text must not be sold in any format or medium without the formal permission of the copyright holders.Please consult the full DRO policy for further details.

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“…The concept of a blockade sphere for Rydberg excitation, adopted here [46,47] to get an intuitive physical picture on real effects of the dipoledipole interaction on the probe and trigger coherences (2), enables one to include Rydberg blockade in the average atomic susceptibilities (18)- (21) which will then be used to describe the optical response of the entire sample. A monochromatic probe impinging upon a sample of length L with a vacuum wave-vector k p experiences, e.g., the phase shift (Fig.…”

Section: Rydberg Cooperative Nonlinearitiesmentioning

confidence: 99%

Polarization-selective optical nonlinearities in cold Rydberg atoms

Artoni

Rocca

2015

Phys. Rev. A

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We study the interaction between a probe and a trigger weak fields in a sample of cold rubidium atoms in the presence of a coupling and a dressing strong fields. Dipole Rydberg blockade may occur and can be set to depend on the probe and trigger polarizations giving rise to diverse regimes of electromagnetically induced transparency (EIT) with a concomitant small probe and trigger absorption and dispersion. This is shown to be relevant to the implementation of polarization conditional probe and trigger cross nonlinearities in cold Rydberg atoms.

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Microwave dressing of Rydberg dark states

Cited by 116 publications

References 37 publications

Electromagnetically induced absorption in a nondegenerate three-level ladder system

Electromagnetically induced absorption in a nondegenerate three-level ladder system

Three-photon electromagnetically induced transparency using Rydberg states

Polarization-selective optical nonlinearities in cold Rydberg atoms

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