Electromagnetically induced transparency line shapes for large probe fields and optically thick media

Pack, Michael V.; Camacho, Ryan M.; Howell, John C.

doi:10.1103/physreva.76.013801

Cited by 20 publications

(12 citation statements)

References 45 publications

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“…The study of the coherent probe field propagation through various atomic systems in presence of one or more coherent radiation fields is of great academic as well as practical interest. Many important physical phenomena like the coherent population trapping [1][2][3][4], electromagnetically induced transparency (EIT) [5][6][7][8], lasing without inversion (LWI) [9,10], stopping and storage of light pulse propagating through a medium [11][12][13][14], optical switching [15,16], etc, are either directly or in few cases indirectly related to such studies. Apart from just academic interest alone, the developments in the field of all optical gates, optical delay generators and quantum computation largely depend on the outcome of research work presently being conducted in this field of study.…”

Section: Introductionmentioning

confidence: 99%

Revisiting the four-level inverted-Y system under both Doppler-free and Doppler-broadened conditions: an analytical approach

Ghosh

Islam

Bhattacharyya³

et al. 2016

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

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In order to simplify the theoretical description of spasers, a gain medium is commonly represented by a two-level system (TLS). A realistic model, however, should have four levels. By using the Lindblad equations we develop a description of such a system and show that depending on ratios of the Rabi frequency and the rate of relaxation of the polarization, a four-level system (FLS) may be reduced to one of two effective TLSs that reproduce the key properties of a FLS.

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Section: Introductionmentioning

confidence: 99%

Revisiting the four-level inverted-Y system under both Doppler-free and Doppler-broadened conditions: an analytical approach

Ghosh

Islam

Bhattacharyya³

et al. 2016

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

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“…The very large range of coupling-laser powers allowed for examination of three regimes of EIT in the LC. For coupling powers near the probe power, P p = 5 μW, we observe a strong probe regime: it manifests as a more triangular lineshape of the F = 3 → F′ = 4 resonance at δ p = 1.17 GHz and can be explained as reduced effective coupling Rabi frequency 46 . In the intermediate range, at P c ≈ 0.2 mW, the coupling field is much stronger than the probe field, but still weak enough to produce a spectrum closely resembling that of ideal EIT, i.e.…”

Section: Observation Of Eit In the Light Cagementioning

confidence: 78%

Coherent interaction of atoms with a beam of light confined in a light cage

et al. 2021

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Controlling coherent interaction between optical fields and quantum systems in scalable, integrated platforms is essential for quantum technologies. Miniaturised, warm alkali-vapour cells integrated with on-chip photonic devices represent an attractive system, in particular for delay or storage of a single-photon quantum state. Hollow-core fibres or planar waveguides are widely used to confine light over long distances enhancing light-matter interaction in atomic-vapour cells. However, they suffer from inefficient filling times, enhanced dephasing for atoms near the surfaces, and limited light-matter overlap. We report here on the observation of modified electromagnetically induced transparency for a non-diffractive beam of light in an on-chip, laterally-accessible hollow-core light cage. Atomic layer deposition of an alumina nanofilm onto the light-cage structure was utilised to precisely tune the high-transmission spectral region of the light-cage mode to the operation wavelength of the atomic transition, while additionally protecting the polymer against the corrosive alkali vapour. The experiments show strong, coherent light-matter coupling over lengths substantially exceeding the Rayleigh range. Additionally, the stable non-degrading performance and extreme versatility of the light cage provide an excellent basis for a manifold of quantum-storage and quantum-nonlinear applications, highlighting it as a compelling candidate for all-on-chip, integrable, low-cost, vapour-based photon delay.

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“…The subject of many studies is the width of EIT [18,[23][24][25][26]. Being both related to the ground-state coherences, EIT and NMOR also depend on the lifetimes of ground-state coherences created between ground-state Zeeman sublevels.…”

Section: Resultsmentioning

confidence: 99%

Nonlinear polarization rotation of a Gaussian pulse propagating through an EIT medium

Dimitrijević¹,

Arsenović²,

Jelenković³

2014

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

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We study numerically the nonlinear magneto-optical rotation of polarization (NMOR) of the laser pulse during its propagation through a cold Rb cloud with induced Zeeman coherences and electromagnetically induced transparency. Evolution of NMOR is calculated by solving the Maxwell-Bloch equations. We consider a linearly polarized Gaussian pulse with different pulse peak amplitudes and widths. For an intensity peak of 5 mW cm −2 and full-width at half-maximum of 10 μs, transient behaviour of NMOR does not follow the pulse intensity variation: NMOR begins to decrease as the pulse's intensity nears its peak value. When the pulse has a smaller peak intensity, NMOR behaves qualitatively differently: the angle of rotation constantly increases during the pulse propagation. Observed differences are explained by the optical pumping into the dark state and the behaviour of the ground-state coherences subjected to coherent population trapping. The same pulse intensity, from different sides of the pulse, during rising and falling sides, produces qualitatively different NMOR shapes, its amplitudes and widths which result can be explained by the successive excitation of atoms during the pulse propagation. It was shown that increasing the relaxation rates of the ground-state coherences, shifts the maximum of the NMOR to higher magnetic field, while the atomic density strongly influences the magnitude of the NMOR.

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Electromagnetically induced transparency line shapes for large probe fields and optically thick media

Cited by 20 publications

References 45 publications

Revisiting the four-level inverted-Y system under both Doppler-free and Doppler-broadened conditions: an analytical approach

Revisiting the four-level inverted-Y system under both Doppler-free and Doppler-broadened conditions: an analytical approach

Coherent interaction of atoms with a beam of light confined in a light cage

Nonlinear polarization rotation of a Gaussian pulse propagating through an EIT medium

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