Decay time in a cavity in slow or fast light regime
22 May 2011-pp 1-1
TL;DR: In this paper, the authors investigated the decay time of a cavity in the presence of positive or negative dispersion and found that the phase velocity rules the decay rate of the cavity, while other studies assume that this decay time is connected to the group velocity.
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.
Citations
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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.
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.
28 citations
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TL;DR: In this article, the authors present a theoretical analysis and experimental study of the behavior of optical cavities filled with slow and fast light materials, and show that the fast-light material-filled 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.
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.
77 citations
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.
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.
31 citations
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.
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.
28 citations
18 citations
TL;DR: 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.
18 citations
"Decay time in a cavity in slow or f..." refers background in this paper
...Then it is possible to achieve a very strong positive or negative dispersion and thus a slow light or fast light regime through EIT phenomenon [3,4]....
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