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Proceedings ArticleDOI: 10.1109/CLEOE.2011.5943404

Decay time in a cavity in slow or fast light regime

22 May 2011-pp 1-1
Abstract: Electromagnetically induced transparency (EIT) in a three-level Λ-system is a phenomenon leading to high dispersion and thus significant changes in the group velocity inside a medium. Some authors have proposed introduction of such highly dispersive medium into a cavity in order to reduce its linewidth, or enhance the sensitivity of an interferometer. These proposals are usually made considering that the phase velocity rules the decay rate of the cavity [1]. But other studies assume that this decay time is connected to the group velocity [2]. In the light of the above discrepancy, we investigate experimentally the decay time of a cavity in the presence of positive or negative dispersion.

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Topics: Group velocity (61%), Slow light (61%), Phase velocity (58%) ...read more
Citations
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Open accessJournal ArticleDOI: 10.1209/0295-5075/82/54002
Fabienne Goldfarb1, Joyee Ghosh1, Joyee Ghosh2, M. David1  +6 moreInstitutions (2)
Abstract: Electromagnetically induced transparency (EIT) is observed in gaseous 4He at room temperature. Ultra-narrow (less than 10 kHz) EIT windows are obtained for the first time for purely electronic spins in the presence of Doppler broadening. The positive role of collisions is emphasized through measurements of the power dependence of the EIT resonance. Measurement of slow light opens up possible ways to applications.

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Topics: Electromagnetically induced transparency (65%), Doppler broadening (57%), Slow light (56%) ...read more

25 Citations

References
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Journal ArticleDOI: 10.1080/09500340701639656
M. Salit1, G. S. Pati1, K. Salit1, M. S. Shahriar1Institutions (1)
Abstract: We present a theoretical analysis and experimental study of the behaviour of optical cavities filled with slow- and fast-light materials, and show that the fast-light material-filled cavities, which can function as ‘white light cavities’, have properties useful for astrophysical applications such as enhancing the sensitivity-bandwidth product of gravitational wave detection and terrestrial measurement of Lense–Thirring rotation via precision gyroscopy.

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Topics: Gravitational wave (56%)

74 Citations


Open accessJournal ArticleDOI: 10.1209/0295-5075/82/54002
Fabienne Goldfarb1, Joyee Ghosh1, Joyee Ghosh2, M. David1  +6 moreInstitutions (2)
01 Jun 2008-EPL
Abstract: Electromagnetically induced transparency (EIT) is observed in gaseous 4He at room temperature. Ultra-narrow (less than 10 kHz) EIT windows are obtained for the first time for purely electronic spins in the presence of Doppler broadening. The positive role of collisions is emphasized through measurements of the power dependence of the EIT resonance. The measurement of slow light opens up possible ways to applications.

...read more

Topics: Electromagnetically induced transparency (65%), Doppler broadening (57%), Slow light (55%) ...read more

28 Citations


Open accessJournal ArticleDOI: 10.1209/0295-5075/82/54002
Fabienne Goldfarb1, Joyee Ghosh2, Joyee Ghosh1, M. David1  +6 moreInstitutions (2)
Abstract: Electromagnetically induced transparency (EIT) is observed in gaseous 4He at room temperature. Ultra-narrow (less than 10 kHz) EIT windows are obtained for the first time for purely electronic spins in the presence of Doppler broadening. The positive role of collisions is emphasized through measurements of the power dependence of the EIT resonance. Measurement of slow light opens up possible ways to applications.

...read more

Topics: Electromagnetically induced transparency (65%), Doppler broadening (57%), Slow light (56%) ...read more

25 Citations


Journal ArticleDOI: 10.1103/PHYSREVA.43.6241
01 Jun 1991-Physical Review A
Topics: Laser (53%)

18 Citations


Journal ArticleDOI: 10.1016/J.CRHY.2009.10.004
Fabienne Goldfarb1, T. Lauprêtre1, J. Ruggiero1, Fabien Bretenaker1  +2 moreInstitutions (2)
Abstract: 4He∗ at room temperature is a particularly interesting system as velocity changing collisions (VCCs) are necessary to observe ultra-narrow (less than 10 kHz) EIT windows for purely electronic spins in the presence of Doppler broadening. Such narrow resonances are known to be linked to a dramatic reduction of the group velocity of a probe pulse, although the medium is transparent. The evolution of the delay is recorded with respect to the coupling beam intensity and to small Raman detunings. We also demonstrate that it is possible to use optically detuned resonances (Fano-like profiles) to see a transition from slow light to negative group velocity. All these measurements are found to be in good agreement with a simple model based on an effective homogeneous linewidth. To cite this article: F. Goldfarb et al., C. R. Physique 10 (2009).

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Topics: Slow light (60%), Electromagnetically induced transparency (58%), Group velocity (57%) ...read more

17 Citations


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