Calculated Hanle transmission and absorption spectra of the<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mmultiscripts><mml:mi mathvariant="normal">Rb</mml:mi><mml:mprescripts /><mml:none /><mml:mrow><mml:mn>87</mml:mn></mml:mrow></mml:mmultiscripts></mml:math><mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mi>D</mml:mi><mml:mrow><mml:mn>1</mml:mn></mml:mrow></mml:msub></mml:mrow></mml:math>line with residual magnetic field

Noh, Heung‐Ryoul; Moon, Han Seb

doi:10.1103/physreva.82.033407

Cited by 21 publications

(16 citation statements)

References 46 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…They proposed that the enhanced absorption depends on both the TMF strength, and atom-laser interaction time, which increases due to the diffusive motion of Rb atoms in the presence of buffer gas atoms. Similar results were also obtained by Noh and moon [16]. They also varied the direction of the TMF in the plane perpendicular to the scanning magnetic field direction and found that the enhanced absorption observed at circularly polarized light is insensitive to the orientation of the TMF.…”

Section: Introductionsupporting

confidence: 84%

“…All the results obtained so far were computed by including collisional effects. The presence of collisions reinforces the population redistribution in the Zeeman sublevels due to the TMF [15][16][17]. When the atomic transit time ( ) T 1 γ ∝ γ is reduced to ∼0.03 ms (corresponding to a pure gas cell i.e.…”

Section: Effect Of Collisionsmentioning

confidence: 94%

“…Recently, several groups have reported sub-natural enhanced absorption resonances on F F F 1 g e g → = − transitions in the presence of an additional magnetic field, applied perpendicular to the scanning magnetic field [12][13][14][15][16][17]. Since the additional magnetic field is transverse to the scanning magnetic field, we will refer to it as TMF.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Effect of an additional magnetic field on Hanle-type absorption resonances

Grewal

Pattabiraman

2014

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

View full text Add to dashboard Cite

We computationally compare Hanle-type resonances for a transition of the line for magnetic field scans parallel (longitudinal scan) and perpendicular (transverse scan) to the direction of propagation of the optical field in the presence of an additional transverse magnetic field (TMF). For a linearly polarized light, the coherent population trapping (CPT) resonances split at line centre and are identical for both longitudinal and transverse scans. When the probe beam ellipticity is varied, the effect of the TMF is found to be opposite for longitudinal and transverse scans. For a longitudinal scan, the splitting observed in the CPT resonance evolves into an enhanced absorption resonance with an increase in ellipticity. For a transverse scan, the splitting vanishes at higher ellipticities. This can be understood in terms of population redistribution in the ground state sublevels and near-neighbor ground state coherences created by the TMF. We also show that the enhanced absorption signal that splits the CPT resonance strongly depends on transit time, and the CPT resonance strength depends on the excited state dephasing rate.

show abstract

Section: Introductionsupporting

confidence: 84%

Section: Effect Of Collisionsmentioning

confidence: 94%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Effect of an additional magnetic field on Hanle-type absorption resonances

Grewal

Pattabiraman

2014

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

View full text Add to dashboard Cite

show abstract

“…As first observed by Zeeman in 1896 [5], the energy levels and transition probabilities of an atomic ensemble are extremely sensitive to an external magnetic field. Therefore a theoretical model for the absorption and dispersive properties of such ensembles has found utility in many applications, for example, Faraday dichroic beam splitter for Raman light [6]; Gigahertz-bandwidth atomic probes [7]; Hanletype coherent population trapping [8]; off-resonance laser frequency stabilization [9]; realizing narrowband atomic filters [10]; cooperative effects in an atomic nanolayer [11]; imaging microwave fields in vapour cells [12] and achieving a compact optical isolator [13].…”

Section: Introductionmentioning

confidence: 99%

Absolute absorption and dispersion of a rubidium vapour in the hyperfine Paschen–Back regime

Weller

Kleinbach

Zentile

et al. 2012

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

View full text Add to dashboard Cite

Here we report on measurements of the absolute absorption and dispersion properties of an isotopically pure 87 Rb vapour for magnetic fields up to and including 0.6 T. We discuss the various regimes that arise when the hyperfine and Zeeman interactions have different magnitudes, and show that we enter the hyperfine Paschen-Back regime for fields greater than 0.33 T on the Rb D 2 line. The experiment uses a compact 1 mm 3 microfabricated vapour cell that makes it easy to maintain a uniform and large magnetic field with a small and inexpensive magnet. We find excellent agreement between the experimental results and numerical calculations of the weak probe susceptibility where the line positions and strengths are calculated by matrix diagonalization.

show abstract

“…Electromagnetically induced transparency or absorption effects are usually observed in atomic vapors as subnatural-width resonances either in a single-frequency magneto-optical (Hanle) configuration [43,44] or in a two-frequency light field [45,46]. Sign of the resonance (EIT or EIA) depends on different conditions of the experiment, such as a structure of involved energy levels in combination with light wave polarization and direction of magnetic field scan or presence of a residual magnetic field (in the Hanle configuration) [22,[46][47][48][49][50][51], collisional depolarization of the excited state in buffered or antirelaxation-coated vapor cells [48,[52][53][54] and others.…”

Section: Theorymentioning

confidence: 99%

Level-crossing resonances on open atomic transitions in a buffered Cs vapor cell: Linewidth narrowing, high contrast and applications to atomic magnetometry

Brazhnikov,

Vishnyakov,

Goncharov

et al. 2022

Preprint

View full text Add to dashboard Cite

The ground-state Hanle effect (GSHE) in alkali-metal atomic vapors using a single circularly polarized light wave underlies one of the most robust and simplest techniques in modern atomic magnetometry. This effect causes a narrow (subnatural-width) resonance in the light wave intensity transmitted through an atomic vapor cell. Usually, GSHE-based sensors operate in the so-called spin-exchange-relaxation-free (SERF) regime to reduce the resonance linewidth. However, this regime requires a relatively high temperature of vapors (≈ 150 • C or even higher), leading to large heat release and power consumption of the sensor head. Besides, without applying special measures, SERF regime significantly limits a dynamic range of magnetic field measurements. Here, we study a pump-probe scheme involving a single elliptically polarized light wave and a polarimetric detection technique. The wave is in resonance with two adjacent optical transitions in the cesium D1 line (λ = 894.6 nm) owing to their overlapping in presence of a buffer gas (130 Torr of neon). Using a small (V ≈ 0.1 cm 3 ) glass vapor cell, we demonstrate the possibility of observing subnaturalwidth resonances with a high contrast-to-width ratio (up to ≈ 45 %/mG) under a low-temperature (≈ 60 • C) regime of operation thanks to a strong light-induced circular dichroism in the medium. Basing on a Λ scheme of atomic energy levels, we obtain explicit analytical expressions for the resonance's line shape. The model reveals a linewidth narrowing effect due to openness of the scheme of levels. This result is unusual for magneto-optical atomic spectroscopy because the openness is commonly considered as a undesirable effect degrading the resonance characteristics. By measuring noise voltage, we have figured out a 1.8 pT/ √ Hz sensitivity of magnetic field measurements with a 60 fT/ √ Hz sensitivity in the photon-shot-noise limit. The results, in general, contribute to the theory of GSHE resonances and can be also applied to development of a low-temperature high-sensitivity miniaturized magnetic field sensor with an extended dynamic range.

show abstract

Calculated Hanle transmission and absorption spectra of theRb87D1line with residual magnetic field

Cited by 21 publications

References 46 publications

Effect of an additional magnetic field on Hanle-type absorption resonances

Effect of an additional magnetic field on Hanle-type absorption resonances

Absolute absorption and dispersion of a rubidium vapour in the hyperfine Paschen–Back regime

Level-crossing resonances on open atomic transitions in a buffered Cs vapor cell: Linewidth narrowing, high contrast and applications to atomic magnetometry

Contact Info

Product

Resources

About