&lt;title&gt;Stray magnetic field influence on coherent population trapping resonances&lt;/title&gt;

Polischuk, V.; Petrov, L.; Slavov, D.; Domelunksen, V. G.; Todorov, G.

doi:10.1117/12.677961

Cited by 3 publications

(3 citation statements)

References 3 publications

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“…There are three different physical processes in equation (18), which are explained in detail in figure 2, similar to [12,44]. We display the corresponding transitions in table 1.…”

Section: Beyond the Two-photon Resonance Conditionmentioning

confidence: 99%

“…The response of the QD medium to the probe field is obtained by the 12th element ρ10 of R. Using the results of equa tions (20), (18) and by assuming ∆ = 0 (in a medium beyond the multiphoton resonance condition ∆ = 0) and k = 0, ele ments of R can be given as…”

Section: Beyond the Two-photon Resonance Conditionmentioning

confidence: 99%

“…Many schemes with different materials and structures have been proposed to enhance lateral shifts [16,17]. The proposal of using coher ent population trapping (CPT) through the behavior of fluo rescence and absorption by an arbitrary oriented magnetic field has been considered [18]. It has been shown that the transverse magn etic field (TMF) can control the CPT ampl itude depending on the orientation of the residual magnetic fields perpend icular to the laser propagation and the col lision effect [19,20].…”

Section: Introductionmentioning

confidence: 99%

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Transverse magnetic field effect on the giant Goos–Hänchen shifts based on a degenerate two-level system

Nasehi¹

2018

Laser Phys. Lett.

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We study the effect of the Goos–Hänchen (GH) shifts through a cavity with degenerate two-level systems in the line of . For this purpose, we focus on the transverse magnetic field (TMF) in a Floquet frame to obtain the giant GH shifts. Physically, the collisional effects of TMF lead to increasing the population trapping in the ground state. However, we demonstrate that the population trapping generates the large negative or positive GH shifts and simultaneously switches from superluminal to subluminal (or vice versa). Also, we investigate the other optical properties such as the longitudinal magnetic field (LMF), which plays an important role in the control of the GH shifts and leads to the generation of new subsystems. In the next step, we evaluate the GH shifts beyond the multi-photon resonance condition by the control of TMF. Moreover, we compute the appearance of negative and positive GH shifts by setting the width of the incident Gaussian beams in the presence of a multi-photon resonance condition. Our results show that superluminal or subluminal light propagation can be simultaneously controlled by adjusting the rates of the TMF and LMF. The significant effects of these factors on the degenerate two-level systems provide different applications such as slow light, optical switches and quantum information storage.

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“…There are three different physical processes in equation (18), which are explained in detail in figure 2, similar to [12,44]. We display the corresponding transitions in table 1.…”

Section: Beyond the Two-photon Resonance Conditionmentioning

confidence: 99%

Section: Beyond the Two-photon Resonance Conditionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Transverse magnetic field effect on the giant Goos–Hänchen shifts based on a degenerate two-level system

Nasehi¹

2018

Laser Phys. Lett.

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Shape of the coherent-population-trapping resonances and high-rank polarization moments

et al. 2007

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The shape of the coherent-population-trapping ͑CPT͒ resonances was investigated theoretically and experimentally at different laser powers. The CPT resonances were observed in fluorescence on the degenerate two-level system of the ͑F =2→ F f =1͒ transition of the 87 Rb D 1 line by means of a Hanle effect configuration in an uncoated vacuum cell. Numerical simulations based on the density matrix formalism, which take into account the high-rank polarization moment ͑HRPMs͒ influence and the velocity distribution of the atoms, were used to calculate the shape of the nonlinear magnetic resonances. The comparison of the theoretical and experimental shapes of the CPT resonances demonstrated that the HRPMs influence the shape at all laser excitation powers, and this influence can be used to explain some peculiarities at the center of the CPT resonance shape.There has been increasing interest in the investigation of the coherent-population-trapping ͑CPT͒ resonances, prepared and registered in different ways, because of many applications in high-resolution spectroscopy, magnetometry, lasing without inversion, laser cooling, ultraslow group velocity propagation of light, etc. ͓1-3͔. In many applications to ensure a reliable operation, a good knowledge of the internal and external factors influencing the resonance shape is required ͓4͔.The CPT resonance shape has been studied experimentally and theoretically in many works ͑see ͓1-6͔, and references therein͒. Most of the experimental investigations ͓1,2,7-11͔ were performed at low laser power, the shape of the resonances was practically Lorentzian, and the dependence of the resonance width on the laser power density was linear up to a few mW/ cm 2 . However, more precise investigations of the shape of the resonances showed that the theoretical shape could not reproduce the measured one ͓4,12-16͔, and in some works ͓4,12,14,16͔ theoretical dependences were proposed describing better the shape of the resonances for the particular experimental conditions. At a high laser power, the influence of the multiphoton interactions increases. The coherences obtained, described in density matrix representation by the components MM Ј , are related in irreducible representation to the polarization moments q k of rank k ͓k =0,1, ... ,2F , q = M − MЈ, where F is the total angular momentum of the lower level͔. For the case of F = 2, the maximum rank of the polarization moment is k = 4, the so-called hexadecapole moment.The manifestation of the hexadecapole moments in laserstimulated polarized fluorescence intensity was observed and described in terms of the iteration approach more than three decades ago ͓17͔. Recently, the influence of the transverse components ͑k =4, q = ±4͒ of the Rb lower-level hexadecapole moments on the transverse ͑k =2, q = ±2͒ upper-level quadrupole components was discussed ͓18͔. The influence of the high-rank polarization moments ͑HRPMs͒ on the nonlinear magneto-optical rotation resonances and their potential applications in nonlinear optics and in magnetometry were st...

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Degenerate two-level system in the presence of a transverse magnetic field

2013

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<title>Stray magnetic field influence on coherent population trapping resonances</title>

Cited by 3 publications

References 3 publications

Transverse magnetic field effect on the giant Goos–Hänchen shifts based on a degenerate two-level system

Transverse magnetic field effect on the giant Goos–Hänchen shifts based on a degenerate two-level system

Shape of the coherent-population-trapping resonances and high-rank polarization moments

Degenerate two-level system in the presence of a transverse magnetic field

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