2008
DOI: 10.1103/physreva.77.063807
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Subnatural linewidth for probe absorption in an electromagnetically-induced-transparency medium due to Doppler averaging

Abstract: We obtain subnatural linewidth (i.e. < Γ) for probe absorption in room-temperature Rb vapor using electromagnetically induced transparency (EIT) in a Λ system. For stationary atoms, the EIT dip for a resonant control laser is as wide as the control Rabi frequency Ωc. But in thermal vapor, the moving atoms fill the transparency band so that the final EIT dip remains subnatural even when Ωc > Γ. We observe linewidths as small as Γ/7 in the D2 line of Rb.PACS numbers: 42.50. Gy,32.80.Qk,42.50.Md,32.80.Wr Laser… Show more

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Cited by 77 publications
(75 citation statements)
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References 20 publications
(20 reference statements)
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“…That is at higher control laser intensity the EIT width increases. However, as is observed experimentally [10], the EIT width is not as high as predicted theoretically.…”
Section: Theorysupporting
confidence: 44%
See 1 more Smart Citation
“…That is at higher control laser intensity the EIT width increases. However, as is observed experimentally [10], the EIT width is not as high as predicted theoretically.…”
Section: Theorysupporting
confidence: 44%
“…So, based on this result it may be possible that if the EIT system remains a closed one or where all the escaped photons are detected, then probably the EIT width will follow the above result. The deviation of EIT width from the theoretical value is not a new one, it has been reported by many authors [12,13], [10] that experimentally observed EIT width is smaller than that predicted by density matrix calculation. In the following we provide a simple solution of the coupled differential equations for the ρ ij .…”
Section: Theorymentioning
confidence: 87%
“…Thus the enhanced dispersion greatly narrows the cavity linewidth. Also, we note that the line narrowing induced by the Doppler effect has been studied in the EIT spectrum [27,28]. While the simulation results show that the cavity linewidth based on EIT is only about one third of the empty-cavity linewidth under the same condition of the proposed ARG scheme, it means that the cavity linewidth based on ARG is about one order magnitude narrower than that based on EIT.…”
Section: Introductionmentioning
confidence: 88%
“…2 in ref. [20]). From the fit, we extract the width of the NMOR contribution which is shown in the inset in Fig.…”
Section: Faraday Rotationmentioning
confidence: 99%