Observation of Ultraslow and Stored Light Pulses in a Solid

Turukhin, A.; Sudarshanam, V. S.; Shahriar, M. S.; Musser, J. A.; Ham, Byoung S.; Hemmer, Philip

doi:10.1103/physrevlett.88.023602

Cited by 865 publications

(566 citation statements)

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“…It is now well understood that electromagnetically induced transparency and related quantum interference effects can be observed in rare-earth ions using their hyperfine structure [42][43][44]. With the ions optically pumped to a specific hyperfine level, appropriately tuned probe and coupling laser beams can be used to form a Λ scheme.…”

Section: Discussionmentioning

confidence: 99%

Coherent Magnetic Response at Optical Frequencies Using Atomic Transitions

et al. 2017

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In optics, the interaction of atoms with the magnetic field of light is almost always ignored since its strength is many orders of magnitude weaker compared to the interaction with the electric field. In this article, by using a magnetic-dipole transition within the 4f shell of europium ions, we show a strong interaction between a green laser and an ensemble of atomic ions. The electrons move coherently between the ground and excited ionic levels (Rabi flopping) by interacting with the magnetic field of the laser. By measuring the Rabi flopping frequency as the laser intensity is varied, we report the first direct measurement of a magnetic-dipole matrix element in the optical region of the spectrum. Using density-matrix simulations of the ensemble, we infer the generation of coherent magnetization with magnitude 5.5 × 10 −3 A=m, which is capable of generating left-handed electromagnetic waves of intensity 1 nW=cm 2 . These results open up the prospect of constructing left-handed materials using sharp transitions of atoms.

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Section: Discussionmentioning

confidence: 99%

Coherent Magnetic Response at Optical Frequencies Using Atomic Transitions

et al. 2017

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“…needed for the AER have also been demonstrated by us earlier 6,7,8,9,10 . In this paper, we describe quantitatively the design of an AER system using Rb vapor in nano-porous glass with paraffin coating and show the simulation results of such a system.…”

Section: Introductionmentioning

confidence: 67%

All optical three dimensional spatio-temporal correlator for automatic event recognition using a multiphoton atomic system

Monjur

Fouda

Shahriar

2016

Optics Communications

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We describe an automatic event recognition (AER) system based on a three-dimensional spatio-temporal correlator (STC) that combines the techniques of holographic correlation and photon echo based temporal pattern recognition. The STC is shift invariant in space and time. It can be used to recognize rapidly an event (e.g., a short video clip) that may be present in a large video file, and determine the temporal location of the event. Using polar Mellin transform, it is possible to realize an STC that is also scale and rotation invariant spatially. Numerical simulation results of such a system are presented using quantum mechanical equations of evolution. For this simulation we have used the model of an idealized, decay-free two level system of atoms with an inhomogeneous broadening that is larger than the inverse of the temporal resolution of the data stream. We show how such a system can be realized by using a lambda-type three level system in atomic vapor, via adiabatic elimination of the intermediate state. We have also developed analytically a three dimensional transfer function of the system, and shown that it agrees closely with the results obtained via explicit simulation of the atomic response. The analytical transfer function can be used to determine the response of an STC very rapidly. In addition to the correlation signal, other nonlinear terms appear in the explicit numerical model. These terms are also verified by the analytical model. We describe how the AER can be operated in a manner such that the correlation signal remains unaffected by the additional nonlinear terms. We also show how such a practical STC can be realized using a combination of a porous-glass based Rb vapor cell, a holographic video disc, and a lithium niobate crystal.

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“…Since the first observation of coherent retrieval of a stored optical pulse in a Bose Einstein condensate using slow light (Liu et al, 2001), interest in quantum memories has increased in the last decade (Alexander et al, 2006;Afzelius et al, 2010;Chaneliere et al, 2005. Choi et al, 2008110 Ham, 1998;Ham 2009a;Ham, 2010a;Hedges et al, 2010;Hetet et al, 2008;Hosseini et al, 2009;Julsgaard et al, 2004;Kocharovskaya et al, 2001;Kraus et al, 2006;Liu et al, 2001;Moiseev & Kroll, 2001;Moiseev et al, 2003;Neumann et al, 2009;Nilsson & Kroll, 2005;Sangouard et al, 2007;Turukhin et al, 2002;Van der Wal, et al, 2003). Because temporal multimode storage capability is required for the quantum repeaters, a photon echo-type protocol has emerged as a best candidate.…”

Section: Introductionmentioning

confidence: 99%

Control of Photon Storage Time in Photon Echoes using a Deshelving Process

Ham¹

2011

Numerical Simulations - Applications, Examples and Theory

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Observation of Ultraslow and Stored Light Pulses in a Solid

Cited by 865 publications

References 20 publications

Coherent Magnetic Response at Optical Frequencies Using Atomic Transitions

Coherent Magnetic Response at Optical Frequencies Using Atomic Transitions

All optical three dimensional spatio-temporal correlator for automatic event recognition using a multiphoton atomic system

Control of Photon Storage Time in Photon Echoes using a Deshelving Process

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