Sub-Doppler and sub-natural narrowing of an absorption line

Gavra, N.; Rosenbluh, M.; Zigdon, T.; Wilson-Gordon, A. D.; Friedmann, H.

doi:10.1016/j.optcom.2007.08.012

Cited by 26 publications

(19 citation statements)

References 23 publications

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“…The pump-induced broadening of the two EIT dips leads to narrowing the central absorption peak. And the narrow absorption peak associated with double EIT windows may have potential application in high-resolution laser spectroscopy [7][8][9]. We also observe the normal mode splitting in the output probe field at high driving power.…”

Section: Introductionmentioning

confidence: 61%

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Double electromagnetically induced transparency and narrowing of probe absorption in a ring cavity with nanomechanical mirrors

Huang¹

2014

J. Phys. B: At. Mol. Opt. Phys.

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We study the effect of a strong coupling field on the absorptive property of a ring cavity with two mirrors oscillating at slightly different frequencies to a weak probe field. We observe double electromagnetically induced transparency windows separated by an absorption peak at line center in the output probe field under the action of a strong coupling field. We find that increasing driving power can broaden the two transparency windows, which results in narrowing of the central absorption peak. At high driving power, the linewidth of the sharp central absorption peak is approximately equal to the mechanical linewidth. We show the normal mode splitting in both the output probe field and the generated Stokes field. We also find that the suppression of the four-wave mixing process can be achieved on resonance.

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Section: Introductionmentioning

confidence: 61%

“…Besides, the studies of EIT have been extended to multi-level atomic systems. The double EIT windows separated by a narrow absorption peak in the probe absorption spectrum have been observed in the four-level atomic systems [7][8][9][10][11]. Recently, the EIT effect has been reported in the macroscopic optomechanical systems.…”

Section: Introductionmentioning

confidence: 97%

Double electromagnetically induced transparency and narrowing of probe absorption in a ring cavity with nanomechanical mirrors

Huang¹

2014

J. Phys. B: At. Mol. Opt. Phys.

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“…Three beams of light act on the atoms in a tripod configuration of the atom-light coupling [49][50][51][52][53][54][55][56][57][58][59][60]. Two strong classical control lasers induce transitions |2 → |0 and |3 → |0 , whereas a weaker probe field drives a transition |1 → |0 , as shown in Fig.…”

Section: Initial Equationsmentioning

confidence: 99%

Slow polaritons with orbital angular momentum in atomic gases

2011

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Polariton formalism is applied for studying the propagation of a probe field of light in a cloud of cold atoms influenced by two control laser beams of larger intensity. The laser beams couple resonantly three hyperfine atomic ground states to a common excited state thus forming a tripod configuration of the atomic energy levels involved. The first control beam can have an optical vortex with the intensity of the beam going to zero at the vortex core. The second control beam without a vortex ensures the loseless (adiabatic) propagation of the probe beam at a vortex core of the first control laser. We investigate the storage of the probe pulse into atomic coherences by switching off the control beams, as well as its subsequent retrieval by switching the control beams on. The optical vortex is transferred from the control to the probe fields during the storage or retrieval of the probe field. We analyze conditions for the vortex to be transferred efficiently to the regenerated probe beam and discuss possibilities of experimental implementation of the proposed scheme using atoms like rubidium or sodium.

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“…In 1999, Lukin et al introduced the idea of DDR and showed that in a Λ-type system, the coherent interaction can lead to a splitting of dark states and the emergence of sharp spectral features [36]. Later, it was shown that this novel spectral feature can be characterized as a powerful mechanism for Doppler-free resonance [37,38], group velocity controlling [39,40], coherently control the adiabatic passage [41,42], four-wave mixing [43,44] and high resolution spectroscopy [45,46]. Up to now, different schemes of the DDR have been investigated and also various phenomena induced by the interacting dark resonance have been explored.…”

Section: Introductionmentioning

confidence: 99%

Multi-photon resonance phenomena using Laguerre–Gaussian beams

Kazemi

Mahmoudi

2016

J. Phys. B: At. Mol. Opt. Phys.

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Abstract. We study the influence of laser profile on the linewidth of the optical spectrum of multi-photon resonance phenomena. First, we investigate the dependence of the absorption spectrum on the laser profile in a two-level system. Thanks to the Laguerre-Gaussian field, the linewidth of the one-photon optical pumping and two-photon absorption peaks are explicitly narrower than that obtained with a Gaussian field. In next section, it is shown that, comparing with the the Gaussian fields, the Laguerre-Gaussian ones reduce the linewidth of the optical spectrum in the coherent population trapping. Interestingly, it turns out that its use of a Laguerre-Gaussian beam makes the linewidth of the spectrum narrower as compared with a Gaussian one in a Doppler-broadened electromagnetically induced transparency. Moreover, we study the effect of the laser profile on the Autler-Townes doublet structure in the absorption spectrum for a laser-driven four-level atomic system. We also consider the different values of the Laguerre-Gaussian mode beam waist, and, perhaps more remarkable, we find that for the small values of waist, the Autler-Townes doublet can be removed and a prominent narrow central peak appears in the absorption spectrum. Finally, we investigate the effect of the laser profile on the linewidth of the sub-natural threephoton absorption peak of double dark resonance. The differences in the linewidth are quite large, offering potential applications in metrology and isotope separation methods. Our results can be used for super ultra high resolution laser spectroscopy and to improve the resolution of the technology of isotope/isomer separation and photo-biology even at essential overlap of the spectra of the different particles.

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Sub-Doppler and sub-natural narrowing of an absorption line

Cited by 26 publications

References 23 publications

Double electromagnetically induced transparency and narrowing of probe absorption in a ring cavity with nanomechanical mirrors

Double electromagnetically induced transparency and narrowing of probe absorption in a ring cavity with nanomechanical mirrors

Slow polaritons with orbital angular momentum in atomic gases

Multi-photon resonance phenomena using Laguerre–Gaussian beams

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