dorsal/arxiv
View SchemaAbsorption resonance and large negative delay in Rb vapor with buffer gas
| Authors | Eugeniy E. Mikhailov, Vladimir A. Sautenkov, Yuri V. Rostovtsev, George R. Welch |
|---|---|
| Categories | |
| ArXiv ID | quant-ph/0309151 |
| URL | https://arxiv.org/abs/quant-ph/0309151 |
| DOI | 10.1364/JOSAB.21.000425 |
| Journal | JOSA B, Volume 21, Issue 2, 425-428 February 2004 (http://josab.osa.org/abstract.cfm?id=78824) |
Abstract
We observe a narrow, isolated, two-photon absorption resonance in Rb for large one-photon detuning in the presence of a buffer gas. In the absence of buffer gas, a standard Lambda configuration of two laser frequencies gives rise to electromagnetically induced transparency (EIT) for all values of one-photon detuning throughout the inhomogeneously (Doppler) broadened line. However, when a buffer gas is added and the one-photon detuning is comparable to or greater than the Doppler width, an absorption resonance appears instead of the usual EIT resonance. We also observe large negative group delay (~ -300 us for a Gaussian pulse propagating through the media with respect to a reference pulse not affected by the media), corresponding to a superluminal group velocity v_g= -c/(3.6x10^6)=-84 m/s.
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"abstract": "We observe a narrow, isolated, two-photon absorption resonance in Rb for\nlarge one-photon detuning in the presence of a buffer gas. In the absence of\nbuffer gas, a standard Lambda configuration of two laser frequencies gives rise\nto electromagnetically induced transparency (EIT) for all values of one-photon\ndetuning throughout the inhomogeneously (Doppler) broadened line. However, when\na buffer gas is added and the one-photon detuning is comparable to or greater\nthan the Doppler width, an absorption resonance appears instead of the usual\nEIT resonance. We also observe large negative group delay (~ -300 us for a\nGaussian pulse propagating through the media with respect to a reference pulse\nnot affected by the media), corresponding to a superluminal group velocity v_g=\n-c/(3.6x10^6)=-84 m/s.",
"arxiv_id": "quant-ph/0309151",
"authors": [
"Eugeniy E. Mikhailov",
"Vladimir A. Sautenkov",
"Yuri V. Rostovtsev",
"George R. Welch"
],
"categories": [
"quant-ph"
],
"doi": "10.1364/JOSAB.21.000425",
"journal_ref": "JOSA B, Volume 21, Issue 2, 425-428 February 2004\n (http://josab.osa.org/abstract.cfm?id=78824)",
"title": "Absorption resonance and large negative delay in Rb vapor with buffer gas",
"url": "https://arxiv.org/abs/quant-ph/0309151"
},
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