Metaoptics with Nonrelativistic Matter Waves

Taillandier-Loize, Thierry; Baudon, J.; Hamamda, M.; Dutier, G.; Bocvarski, V.; Boustimi, M.; Perales, F.; Ducloy, M.

doi:10.1155/2012/734306

Cited by 2 publications

(2 citation statements)

References 26 publications

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“…[14] could hardly be extended to incoherent m atter waves as it requires the wave packet to populate initially only a narrow range o f quasim om enta in the ground Bloch band o f an optical lattice. Recently, com oving potentials have been proposed as a prom ising m eans to m im ic negative refraction for atom ic beam s [15], Should such large negative refraction have been obtained, it could have led to quasiperfect focus kcqtttv@nus.edu.sg [16,17]. The sim ultaneous occurrence o f negative refraction and com pensation o f the dispersion of wave packets resulting from the interaction w ith the com oving potential, typical o f tim e reversal for atom ic beam s, w ould have been o f particular interest for the realization o f interferom eters o f great accuracy [18].…”

Section: Introductionmentioning

confidence: 99%

Negative refraction for incoherent atomic matter waves

Vogt

2015

Phys. Rev. A

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In a recent paper [Phys, Rev. Lett. 102, 140403 (2009)], Baudoneta/. reported that a comoving potential acting on atoms could mimic negative-index-refraction properties of left-handed photonic metamaterials. We show in this article that a better approximation is necessary in order to describe the real physical system proposed by Baudon et al. We derive analytical formulas and compare their solutions with numerical simulations. It turns out that instead of negative refraction, it is simply atomic reflection that occurs in the above-mentioned comoving potential. Furthermore, we find that the wave packet of the reflected atomic beam by comoving potentials can be narrowed by negative dispersion. Finally, we identify a potential configuration, near the interface with a cubic-type potential barrier, that may lead to the observation of negative refraction with incoherent matter waves.

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Section: Introductionmentioning

confidence: 99%

Negative refraction for incoherent atomic matter waves

Vogt

2015

Phys. Rev. A

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“…The main difficulty here to move to larger values of z is the very short range (at thermal velocities, a few nm up to a few tens nm) within which such transitions are observable. Larger ranges (50-100 nm) are expected at lower velocity (a few tens of m/s) experimentally accessible, using a magneto-optical trap from which atoms are pushed away by a laser beam [16]. If no selection of atom-surface distance z is performed, then both elastic and inelastic diffractions are so largely dominated by short-distance interactions that no retardation effect can be evidenced.…”

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confidence: 99%

Anisotropic atom-surface interactions in the Casimir-Polder regime

et al. 2014

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The distance-dependence of the anisotropic atom-wall interaction is studied. The central result is the 1/z 6 quadrupolar anisotropy decay in the retarded Casimir-Polder regime. Analysis of the transition region between non-retarded van der Waals regime (in 1/z 3 ) and Casimir-Polder regime shows that the anisotropy cross-over occurs at very short distances from the surface, on the order of 0.03λ, where λ is the atom characteristic wavelength. Possible experimental verifications of this distance dependence are discussed. PACS numbers: 34.35.+a, 03.75.Be, 12.20.Fv The force between neutral polarisable systems is a ubiquitous phenomenon in nature, with many applications in physics, chemistry, biology. . . A paramount example is the long-range interaction potential between neutral microscopic quantum systems, like atomic systems, and a solid surface. For plane surfaces this interaction is usually governed by a power-law attractive potential [1,2]. For atom-surfaces distances z smaller than the wavelengths of the optical transitions involved in the atomic polarisability, the interaction is of the dipoleinduced dipole type, and governed by the well-known non-retarded van der Waals potential in −C 3 /z 3 , which reflects the correlations of dipole fluctuations [1]. At larger distances, retardation effects get important, and asymptotically lead to a −C 4 /z 4 potential, as demonstrated in the pioneering work of Casimir and Polder [2].Atom (molecule) -surface forces are central in numerous scientific and technological domains: surface adsorption of atoms, gas-surface equilibrium, cavity QED [3], quantum reflection of atoms on surfaces [4], microelectromechanical systems [5], research for a fifth fundamental force [6], etc. In most of the above studies, the interaction potential has to be treated in its full distance range (retarded and non-retarded), but is generally considered scalar. However the atom-surface potential has a cylindrical symmetry around the surface normal, and exhibits a quadrupolar component which may get important for non-scalar energy levels. Anisotropic surface potential strongly alters the internal dynamics and symmetry of nearby atomic systems. For example, surfaceinduced symmetry break and internal level coupling have been observed on rare-gas metastable states scattered at material surfaces [7]. From previous experimental studies of the anisotropic potential, on can underline two points: (i) on one hand, in selective reflection (SR) studies -generally sensitive to a λ/2π distance (∼ 100 nm) * Corresponding author: martial.ducloy@univ-paris13.fr from the surface (see e.g.[8]) -, the influence of the anisotropic potential has not been observed, although SR spectroscopy gives access to the excited atomic response [9]; (ii) on the other hand, in beam scattering studies, the range of the anisotropic interaction appears to be always smaller than 10 nm -in general 5 nm or less - [10]. Thus one can state that up to now those anisotropic characteristics have been observed in the non-retarded regime. Ind...

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Metaoptics with Nonrelativistic Matter Waves

Cited by 2 publications

References 26 publications

Negative refraction for incoherent atomic matter waves

Negative refraction for incoherent atomic matter waves

Anisotropic atom-surface interactions in the Casimir-Polder regime

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