Interplay between radiation pressure force and scattered light intensity in the cooperative scattering by cold atoms

Bienaimé, Tom; Bachelard, Romain; Chabé, Julien; Rouabah, Mohamed Taha; Bellando, Louis; Courteille, Ph. W.; Piovella, N.; Kaiser, Robin

doi:10.1080/09500340.2013.829264

Cited by 15 publications

(13 citation statements)

References 31 publications

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“…The relevant parameters to describe light scattering in dilute clouds of two-level systems is the resonant optical thickness of the cloud, which is given by b 0 = 2N/(k 0 σ R ) 2 with an on-resonant scattering cross section for a single atom given in the scalar model by σ sc = λ 2 /π . The detuning dependent optical thickness then (1), the far-field intensity in a direction k and at a distance r can be calculated using [23] …”

Section: Coupled Dipole Modelmentioning

confidence: 99%

Coherent and incoherent multiple scattering

et al. 2014

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We compare two different models of transport of light in a disordered system with a spherical Gaussian distribution of scatterers. A coupled dipole model, taking into account all interference effects, is compared to an incoherent model, using a random walk of particles. Besides the well-known coherent backscattering effect and a well pronounced forward lobe, the incoherent model reproduces extremely well all scattering features. In an experiment with cold atoms, we use the momentum recoil imparted on the center of mass of the sample as a partial probe of the light-scattering properties. We find that the force acting on the center of mass of the atoms is not well suited to exhibit the coherence effects in light propagation under multiple-scattering conditions.

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Section: Coupled Dipole Modelmentioning

confidence: 99%

Coherent and incoherent multiple scattering

et al. 2014

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“…The microscopic and mean-field approaches have been shown to provide equivalent results on the presence of polaritonic modes in these clouds [13,14]. Optical forces [15,16] have also drawn some attention recently, yet the role of dipoledipole correlations have been discussed to be minor [17]. Recently, the microscopic theory emerged as an important tool to study the deviations from mean-field theory due to strong particle-particle correlations, as they appear in the high density regime [18,19] or close to the atomic resonance [20].…”

Section: Introductionmentioning

confidence: 96%

Role of disorder in super- and subradiance of cold atomic clouds

2018

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The presence of superradiance and subradiance in microscopic and mean-field approaches to light scattering in atomic media is investigated. We show that these phenomena are present in both descriptions, with only minor quantitative differences, so neither rely on disorder. In particular, they are most prominent in media with high resonant optical depth yet far-detuned light, i.e.. in the single-scattering regime.

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“…It only neglects refraction and diffraction effects, which could have an impact for very small clouds [7]. It also neglects the forward coherent lobe [10,42,43], which actually is diffracted/refracted light (this light is also responsible for the extinction paradox [44]). The Beer-Lambert result for the total intensity is equivalent to integrating in all directions the scattered intensity computed from the RW model.…”

Section: Beer-lambert Lawmentioning

confidence: 99%

Comparison of three approaches to light scattering by dilute cold atomic ensembles

Sokolov¹,

Guerin²

2019

J. Opt. Soc. Am. B

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Collective effects in atom-light interaction is of great importance for cold-atom-based quantum devices or fundamental studies on light transport in complex media. Here we discuss and compare three different approaches to light scattering by dilute cold atomic ensembles. The first approach is a coupled-dipole model, valid at low intensity, which includes cooperative effects, like superradiance, and other coherent properties. The second one is a random-walk model, which includes classical multiple scattering and neglects coherence effects. The third approach is a crude approximation only based on the attenuation of the excitation beam inside the medium, the so-called "shadow effect". We show that in the case of a low-density sample, the random walk approach is an excellent approximation for steady-state light scattering, and that the shadow effect surprisingly gives rather accurate results at least up to optical depths on the order of 15.

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Interplay between radiation pressure force and scattered light intensity in the cooperative scattering by cold atoms

Cited by 15 publications

References 31 publications

Coherent and incoherent multiple scattering

Coherent and incoherent multiple scattering

Role of disorder in super- and subradiance of cold atomic clouds

Comparison of three approaches to light scattering by dilute cold atomic ensembles

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