Coherent effects on the Zeeman sublevels of hyperfine states in optical pumping of Rb by monomode diode laser

Dancheva, Yordanka; Alzetta, G.; Cartaleva, S.; Taslakov, M.; Andreeva, C.

doi:10.1016/s0030-4018(00)00643-x

Cited by 112 publications

(103 citation statements)

References 15 publications

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“…In the literature the GSHE is sometimes referred to as a particular case of the coherent population trapping (CPT) effect [29,30]. From the discussion above, one could rather speak of a pure population trapping resonance when applying a treatment (like ours), whereẑ =ε, and of a coherence trapping resonance in a treatment with the choiceẑ =B.…”

Section: Dark and Bright Resonances And Coherent Population Trapmentioning

confidence: 99%

Ground-state Hanle effect based on atomic alignment

Breschi

Weis

2012

Phys. Rev. A

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We have studied the ground-state Hanle effect (GSHE) excited by linearly polarized laser light on the D 1 line of cesium atoms. We have solved algebraically the Liouville equation using the irreducible tensor formalism, and derive an analytical expression for the resonance line shapes in a magnetic field of arbitrary direction. The model predictions are in excellent agreement with experimental observations in various field geometries. Our model is valid for arbitrary F → F transitions in the low-power limit. We discuss the relation between the GSHE and electromagnetically induced transparency or absorption. Our approach allows a full understanding of the mechanism of the GSHE and provides tools for quantifying the resonance contrast, a crucial parameter for metrological applications of level crossing resonances.

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Section: Dark and Bright Resonances And Coherent Population Trapmentioning

confidence: 99%

Ground-state Hanle effect based on atomic alignment

Breschi

Weis

2012

Phys. Rev. A

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“…4 for an energy level scheme of the 87 Rb D1 line). Dancheva et al [11] were the first to observe a Hanle/EIA resonance on a F g → F e = F g + 1 transition of the D1 line. They pointed out the fact that the EIA resonance can be observed in spite of the transition being open (radiative decay can occur from the excited state to either ground state hyperfine levels).…”

Section: Introductionmentioning

confidence: 99%

Inhibition of electromagnetically induced absorption due to excited-state decoherence in Rb vapor

Failache¹,

Valente²,

Ban³

et al. 2003

Phys. Rev. A

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The explanation presented in [Taichenachev et al, Phys. Rev. A 61, 011802 (2000)] according to which the electromagnetically induced absorption (EIA) resonances observed in degenerate two level systems are due to coherence transfer from the excited to the ground state is experimentally tested in a Hanle type experiment observing the parametric resonance on the D1 line of 87 Rb. While EIA occurs in the F = 1 → F ′ = 2 transition in a cell containing only Rb vapor, collisions with a buffer gas (30 torr of N e) cause the sign reversal of this resonance as a consequence of collisional decoherence of the excited state. A theoretical model in good qualitative agreement with the experimental results is presented.

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“…CPT resonances prepared in the Hanle configuration have been investigated for atoms irradiated by monochromatic laser field in a way that different polarization components couple the Zeeman sublevels of single hyperfine (hf) ground level to a common excited state and introduce coherence between ground magnetic sublevels at zero value of a scanned around it magnetic field B, orthogonal to the orientation/alignment of atoms. As shown in [3], in absence of depolarizing collisions of the excited state, and depending on the ratio of the degeneracies of the two hf levels involved in the optical hf transition, EIT and EIA sub-natural width resonances can be observed for degenerate two-level systems. EIT is realized when the conditions F g → F e = F g − 1, F g are met, while EIA is observed for F g → F e = F g +1.…”

Section: Introductionmentioning

confidence: 86%

“…The degenerate two-level systems provide many possibilities for investigation of CPT. Zeeman optical pumping destroyed by magnetic field (MF) allows the observation of EIT [2], as well as electromagnetically induced absorption (EIA) [3] in the atomic medium. CPT resonances prepared in the Hanle configuration have been investigated for atoms irradiated by monochromatic laser field in a way that different polarization components couple the Zeeman sublevels of single hyperfine (hf) ground level to a common excited state and introduce coherence between ground magnetic sublevels at zero value of a scanned around it magnetic field B, orthogonal to the orientation/alignment of atoms.…”

Section: Introductionmentioning

confidence: 99%