Journal ArticleDOI
Electromagnetically-induced transparency, slow light, and negative group velocities in a room temperature vapor of 4He∗
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TLDR
Goldfarb et al. as discussed by the authors showed that it is possible to use optically detuned resonances (Fano-like profiles) to see a transition from slow light to negative group velocity.About:
This article is published in Comptes Rendus Physique.The article was published on 2009-12-01. It has received 18 citations till now. The article focuses on the topics: Slow light & Electromagnetically induced transparency.read more
Citations
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Proceedings Article
Observation of Electromagnetically Induced Transparency in Collisionally Broadened Lead Vapor
TL;DR: In this article, the probe energy is increased to 150 n3 (10" W/cm ) and the absorption cross section at the transmission maximum increases by a factor of approximately 2.
Posted Content
Bose-Einstein Condensation of Metastable Helium
F. Pereira Dos Santos,Jérémie Léonard,Junmin Wang,C. J. Barrelet,F. Perales,Ernst M. Rasel,C. S. Unnikrishnan,Michèle Leduc,Claude Cohen-Tannoudji +8 more
TL;DR: In this article, a Bose-Einstein Condensate was observed in a dilute gas of $4$He in the 2^3S_1$ metastable state and the elastic collision rate was estimated to be about $5\times10^4$ s$^{-1}$, indicating that we are deeply in the hydrodynamic regime.
Journal ArticleDOI
Photon lifetime in a cavity containing a slow-light medium.
T. Lauprêtre,C. Proux,Rupamanjari Ghosh,Sylvain Schwartz,Fabienne Goldfarb,Fabien Bretenaker +5 more
TL;DR: In this paper, the authors investigated the lifetime of the photons in a cavity containing a medium exhibiting strong positive dispersion, provided by a metastable helium gas at room temperature in the electromagnetically induced transparency regime.
Journal ArticleDOI
Photon lifetime in a cavity containing a slow-light medium
T. Lauprêtre,C. Proux,Rupamanjari Ghosh,Sylvain Schwartz,Fabienne Goldfarb,Fabien Bretenaker +5 more
TL;DR: The results definitely prove that the lifetime of the cavity photons is governed by the group velocity of light in the cavity and not its phase velocity.
Journal ArticleDOI
Observation of Ultra-narrow Electromagnetically Induced Transparency and Slow Light using Purely Electronic Spins in a Hot Atomic Vapor
Fabienne Goldfarb,Joyee Ghosh,Joyee Ghosh,M. David,J. Ruggiero,Thierry Chanelière,J.-L. Le Gouët,H. Gilles,Rupamanjari Ghosh,Fabien Bretenaker +9 more
TL;DR: In this article, the EIT windows were obtained for purely electronic spins in the presence of Doppler broadening and the positive role of collisions was emphasized through measurements of the power dependence of EIT resonance.
References
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Journal ArticleDOI
Light speed reduction to 17 metres per second in an ultracold atomic gas
Lene Vestergaard Hau,Lene Vestergaard Hau,Stephen E. Harris,Zachary Dutton,Zachary Dutton,Cyrus H. Behroozi,Cyrus H. Behroozi +6 more
TL;DR: In this paper, an experimental demonstration of electromagnetically induced transparency in an ultracold gas of sodium atoms, in which the optical pulses propagate at twenty million times slower than the speed of light in a vacuum, is presented.
Journal ArticleDOI
Ultraslow group velocity and enhanced nonlinear optical effects in a coherently driven hot atomic gas
Michael M. Kash,Michael M. Kash,Vladimir A. Sautenkov,Alexander S. Zibrov,Alexander S. Zibrov,Leo W. Hollberg,George R. Welch,Mikhail D. Lukin,Yuri V. Rostovtsev,Edward S. Fry,Edward S. Fry,Marlan O. Scully,Marlan O. Scully +12 more
TL;DR: In this paper, small group velocities of order 90 m/s and large group delays of greater than 0.26 ms were observed in an optically dense hot rubidium gas ( $\ensuremath{\approx}360\mathrm{K}$).
Journal ArticleDOI
Laser cooling below the one-photon recoil by velocity-selective coherent population trapping.
TL;DR: A new laser-cooling scheme based on velocity-selective optical pumping of atoms into a nonabsorbing coherent superposition of states is presented, allowing transverse cooling of metastable metastable He atoms to a temperature of 2 K, lower than both the usual Doppler cooling limit and the one-photon recoil energy.
Journal ArticleDOI
Dispersive properties of electromagnetically induced transparency.
TL;DR: An atomic transition that has been made transparent by applying an additional electromagnetic field exhibits a rapidly varying refractive index with zero group velocity dispersion at line center.
Journal ArticleDOI
Observation of electromagnetically induced transparency in collisionally broadened lead vapor.
TL;DR: In this article, the authors reported the observation of electromagnetically induced transparency on the collisionally broadened resonance line of Pb vapor, with the Pb atoms remaining in the ground state.