Light-induced polarization effects in atoms with partially resolved hyperfine structure and applications to absorption, fluorescence, and nonlinear magneto-optical rotation

Auzinsh, M.; Budker, Dmitry; Rochester, Simon

doi:10.1103/physreva.80.053406

Cited by 35 publications

(41 citation statements)

References 32 publications

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“…Similar quantum interference effects have been discussed theoretically and in detail for the case of nonlinear magneto-optical rotation by Auzinsh and co-workers in Ref. [42].…”

Section: B Impact On the Performance Of Cpt-based Atomic Clocksmentioning

confidence: 58%

Light effects in the atomic-motion-induced Ramsey narrowing of dark resonances in wall-coated cells

et al. 2010

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We report on light shift and broadening in the atomic-motion-induced Ramsey narrowing of dark resonances prepared in alkali-metal vapors contained in wall-coated cells without buffer gas. The atomic-motion-induced Ramsey narrowing is due to the free motion of the polarized atomic spins in and out of the optical interaction region before spin relaxation. As a consequence of this effect, we observe a narrowing of the dark resonance linewidth as well as a reduction of the ground states' light shift when the volume of the interaction region decreases at constant optical intensity. The results can be intuitively interpreted as a dilution of the intensity effect similar to a pulsed interrogation due to the atomic motion. Finally the influence of this effect on the performance of compact atomic clocks is discussed.

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“…Similar quantum interference effects have been discussed theoretically and in detail for the case of nonlinear magneto-optical rotation by Auzinsh and co-workers in Ref. [42].…”

Section: B Impact On the Performance Of Cpt-based Atomic Clocksmentioning

confidence: 58%

Light effects in the atomic-motion-induced Ramsey narrowing of dark resonances in wall-coated cells

et al. 2010

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“…As shown in Refs. [23,24], the atomic motion should be treated differently when atoms are contained in a buffergas-free uncoated vapor cell, a buffer-gas-filled cell, or a paraffin-coated cell. The simplest situation is in the first case, i.e., the scenario investigated in this work, when the alkali-atom collisions are rare, and the most important mechanism of ground-state relaxation are collisions with the walls.…”

Section: Theoretical Backgroundmentioning

confidence: 99%

“…Thus, atomic velocity and hence light detuning do not change between pumping and probing stages and light generates and probes atomic polarization generated in a given hyperfine state. In such a case, the signal from each velocity group can be calculated independently and then summed over the velocity distribution with weights given by the distribution, leading to the ensemble-averaged polarization rotation [23,24] …”

Section: Appendix B: Model Derivationmentioning

confidence: 99%

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Nonlinear magneto-optical rotation in rubidium vapor excited with blue light

et al. 2015

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We present experimental and numerical studies of nonlinear magneto-optical rotation (NMOR) in rubidium vapor excited with resonant light tuned to the 5 2 S 1/2 → 6 2 P 1/2 absorption line (421 nm). Contrary to the experiments performed to date on the strong D1 or D2 lines, in this case, the spontaneous decay of the excited state 6 (2009), we demonstrate that despite the complexity of the structure, NMOR can be adequately described with a model, where only a single excited-state relaxation rate is used.

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“…The aim of this study is to clarify how exactly the HF interaction affects the formation of adiabatic states in the AT effect and how those states are expressed in the laser excitation spectra. In the weak excitation limit, the effects of partially resolved HF structure on light-induced polarization of atoms have been studied in detail in [4]. Here, we are concerned with the effects of strong coupling on the formation of dark and bright states upon interaction of a hyperfine level system with coherent light fields.…”

Section: Introductionmentioning

confidence: 99%

Hyperfine interaction in the Autler-Townes effect: The formation of bright, dark, and chameleon states

et al. 2017

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This paper is devoted to clarifying the implications of hyperfine (HF) interaction in the formation of adiabatic (i.e., "laser-dressed") states and their expression in the Autler-Townes (AT) spectra. We first use the Morris-Shore model [J. R. Morris and B. W. Shore, Phys. Rev. A 27, 906 (1983)] to illustrate how bright and dark states are formed in a simple reference system where closely spaced energy levels are coupled to a single state with a strong laser field with the respective Rabi frequency S . We then expand the simulations to realistic hyperfine level systems in Na atoms for a more general case when non-negligible HF interaction can be treated as a perturbation in the total system Hamiltonian. A numerical analysis of the adiabatic states that are formed by coupling of the 3p 3/2 and 4d 5/2 states by the strong laser field and probed by a weak laser field on the 3s 1/2 − 3p 3/2 transition yielded two important conclusions. Firstly, the perturbation introduced by the HF interaction leads to the observation of what we term "chameleon" states-states that change their appearance in the AT spectrum, behaving as bright states at small to moderate S , and fading from the spectrum similarly to dark states when S is much larger than the HF splitting of the 3p 3/2 state. Secondly, excitation by the probe field from two different HF levels of the ground state allows one to address orthogonal sets of adiabatic states; this enables, with appropriate choice of S and the involved quantum states, a selective excitation of otherwise unresolved hyperfine levels in excited electronic states.

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Light-induced polarization effects in atoms with partially resolved hyperfine structure and applications to absorption, fluorescence, and nonlinear magneto-optical rotation

Cited by 35 publications

References 32 publications

Light effects in the atomic-motion-induced Ramsey narrowing of dark resonances in wall-coated cells

Light effects in the atomic-motion-induced Ramsey narrowing of dark resonances in wall-coated cells

Nonlinear magneto-optical rotation in rubidium vapor excited with blue light

Hyperfine interaction in the Autler-Townes effect: The formation of bright, dark, and chameleon states

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