Ladder-type electromagnetically induced transparency with optical pumping effect

He, Zong Syun; Tsai, Jyh Hung; Chang, Yung Yung; Liao, Chi Chuan; Tsai, Chin‐Chun

doi:10.1103/physreva.87.033402

Cited by 14 publications

(7 citation statements)

References 30 publications

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“…In our previous work we investigated the role of the laser-field polarization in Rydberg EIT, and qualitatively modeled its Zeeman spectra using standard density matrix method [16]. The effect of optical pumping on the transmission, width and profile of EIT spectra has already been discussed in Λ and ladder-type systems [17][18][19][20]. The effect of optical pumping in diatomic molecules has been investigated [21,22].…”

Section: Introductionmentioning

confidence: 99%

Interplay between optical pumping and Rydberg EIT in magnetic fields

Zhang¹,

Bao²,

Zhang³

et al. 2018

Opt. Express

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We perform Zeeman spectroscopy on a Rydberg electromagnetically induced transparency (EIT) system in a room-temperature Cs vapor cell, in magnetic fields up to 50 Gauss. The magnetic interactions of the |6S 1/2 F g = 4> ground, |6P 3/2 F e = 5> intermediate, and |33S 1/2 > Rydberg states that form the ladder-type EIT system are in the linear Zeeman, quadratic Zeeman, and the Paschen-Back regimes, respectively. We explain the dependence of Rydberg EIT spectra on the magnetic field and polarization. The asymmetry of the EIT spectra, which is caused by the quadratic Zeeman effect of the intermediate state, becomes paramount in magnetic fields ≥40 Gauss. We investigate the interplay between Rydberg EIT, which reduces photon scattering, and optical pumping, which relies on photon scattering. We employ a quantum Monte Carlo wave-function approach to quantitatively model the spectra and their asymmetry behavior. Simulated spectra are in good agreement with the experimental data.

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Section: Introductionmentioning

confidence: 99%

Interplay between optical pumping and Rydberg EIT in magnetic fields

Zhang¹,

Bao²,

Zhang³

et al. 2018

Opt. Express

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“…In other references, including [27], the Zeeman substructure is accounted for by a sum over the involved levels for a given light polarization, weighted by the corresponding ClebschGordan coefficients. Neither approach can explain the influence of the magnetic field that we see in our experiment.…”

Section: Theoretical Modelmentioning

confidence: 99%

“…Despite the fact that our measurements are performed in a Doppler-broadened room-temperature vapor cell, we retrieve spectrally narrow EIT signals with a resolved Rydberg hyperfine splitting. Remarkably, the spectra change significantly already upon magnetic field variations of ∼ 0.1 G. It is known that the polarization of the light influences the spectrum [25,26] through optical pumping effects [27]. A full description must consider the multi-level structure of the atom [28], typically the hyperfine and Zeeman substructure [28][29][30].…”

Section: Introductionmentioning

confidence: 99%

Electromagnetically induced transparency with Rydberg atoms across the Breit-Rabi regime

et al. 2017

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We present experimental results on the influence of magnetic fields and laser polarization on electromagnetically induced transparency (EIT) using Rydberg levels of 87 Rb atoms. The measurements are performed in a room temperature vapor cell with two counter-propagating laser beams at 480 nm and 780 nm in a ladder-type energy level scheme. We measure the EIT spectrum of a range of ns 1/2 Rydberg states for n = 19 − 27, where the hyperfine structure can still be resolved. Our measurements span the range of magnetic fields from the low field linear Zeeman regime to the high field PaschenBack regimes. The observed spectra are very sensitive to small changes in magnetic fields and the polarization of the laser beams. We model our observations using optical Bloch equations that take into account the full multi-level structure of the atomic states involved and the decoupling of the electronic J and nuclear I angular momenta in the Breit-Rabi regime. The numerical model yields excellent agreement with the observations. In addition to EIT related experiments, our results are relevant for experiments involving coherent excitation to Rydberg levels in the presence of magnetic fields.

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“…where n is the atomic density, l denotes the length of the atomic cell, D RT is the pure two-level absorption and is called optical depth, and γ represents the two-level absorption linewidth [16,23]. This calculation includes the effects of the absorption as Doppler broadening, TPA and TSE, and reduction in probe absorption (EIT) in [22].…”

Section: B Experimental Observationmentioning

confidence: 99%

“…In the natural atomic system, theoretically, EIT linewidth is only limited by the decoherence of states, but, in reality, the decay rates of atomic states and nonradiative dephasing rate due to the inelastic collisions between atoms play stellar roles affecting the transparency linewidth [7]. In other words, as the coupling Rabi frequency is not too large (this will increase the EIT linewidth due to the saturation effect [15,16]), the decay rates and nonradiative dephasing rate are taken for granted to degrade EIT and broaden its linewidth, even in a lower coupling intensity and weak probe regime. The smaller the decay and nonradiative dephasing rates are, the narrower the linewidth is.…”

Section: Introductionmentioning

confidence: 99%

Low-light-level ladder-type electromagnetically induced transparency and two-photon absorption

Chen

et al. 2014

J. Opt. Soc. Am. B

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Ladder-type electromagnetically induced transparency (EIT) and two-photon absorption (TPA) under a low-light level of probe (0.2 μW∕cm 2 0.06Γ 2 ) and weak coupling power for a cesium atom at room temperature are investigated. Reduction of the fluorescence on the TPA in a three-level system via EIT interference is clearly observed and analyzed under the low probe Rabi frequency of about 0.30 MHz to avoid the affects from the vicinity of intermediate hyperfine states. The transparency ratio of EIT derived from the reduction of fluorescence is about 25%. Additionally, the EIT linewidth observed can be as narrow as 2.64 MHz, while the coupling Rabi frequency is around 2.66 MHz. By solving the steady-state optical Bloch equations, the numerical simulation spectra are in good agreement with EIT and TPA. According to our investigations, the Doppler velocity averaging effect over the thermal atoms reducing the linewidth of the EIT signal proves the advantage of observing the EIT in the room-temperature cell.

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Ladder-type electromagnetically induced transparency with optical pumping effect

Cited by 14 publications

References 30 publications

Interplay between optical pumping and Rydberg EIT in magnetic fields

Interplay between optical pumping and Rydberg EIT in magnetic fields

Electromagnetically induced transparency with Rydberg atoms across the Breit-Rabi regime

Low-light-level ladder-type electromagnetically induced transparency and two-photon absorption

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