All-optical atom surface traps implemented with one-dimensional planar diffractive microstructures

Alloschery, O.; Mathevet, Renaud; Weiner, J.; Lezec, Henri J.

doi:10.1364/oe.14.012568

Cited by 7 publications

(4 citation statements)

References 18 publications

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“….) can focus waves into a narrow line [77]. Consequently, focusing matter waves by 1D and/or circular ZPs can create a wide range of surface patterns, thus complementing existing matter-wave lithography techniques, such as the use of optical standing waves to focus and deposit atoms in parallel lines [12]- [15].…”

Section: Prospects For Zp-based Matter-wave Lithographymentioning

confidence: 99%

“…It is not necessary for ZPs to be circular in order to focus incident waves. For example, 1D ZPs comprising diffraction slits with edges at positions R n = R 1 n 1/2 (n = 1, 2, 3, ...) can focus waves into a narrow line [100]. Consequently, focusing matter waves by 1D and/or circular ZPs can create a wide range of surface patterns, thus complementing existing matter-wave lithography techniques, such as the use of optical standing waves to focus and deposit atoms in parallel lines [12,13,14,15,16].…”

Section: B Prospects For Zp-based Matter-wave Lithographymentioning

confidence: 99%

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Zone-plate focusing of Bose–Einstein condensates for atom optics and erasable high-speed lithography of quantum electronic components

et al. 2010

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We show that Fresnel zone plates, fabricated in a solid surface, can sharply focus atomic Bose-Einstein condensates that quantum reflect from the surface or pass through the etched holes. The focusing process compresses the condensate by orders of magnitude despite inter-atomic repulsion. Crucially, the focusing dynamics are insensitive to quantum fluctuations of the atom cloud and largely preserve the condensates' coherence, suggesting applications in passive atom-optical elements, for example zone plate lenses that focus atomic matter waves and light at the same point to strengthen their interaction. We explore transmission zone-plate focusing of alkali atoms as a route to erasable and scalable lithography of quantum electronic components in two-dimensional electron gases embedded in semiconductor nanostructures. To do this, we calculate the density profile of a two-dimensional electron gas immediately below a patch of alkali atoms deposited on the surface of the nanostructure by zone-plate focusing. Our results reveal that surface-induced polarization of only a few thousand adsorbed atoms can locally deplete the electron gas. We show that, as a result, the focused deposition of alkali atoms by existing zone plates can create quantum electronic components on the 50 nm scale, comparable to that attainable by ion beam implantation but with minimal damage to either the nanostructure or electron gas.

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Section: Prospects For Zp-based Matter-wave Lithographymentioning

confidence: 99%

Section: B Prospects For Zp-based Matter-wave Lithographymentioning

confidence: 99%

Zone-plate focusing of Bose–Einstein condensates for atom optics and erasable high-speed lithography of quantum electronic components

et al. 2010

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“…Fresnel lenses [18], metamaterial lenses [19], or diffraction the qubit states that are chosen are part of the ground-state patterns [20,21] are being explored. Of particular interest are manifold, resulting in long coherence times, limited by trap approaches that allow trapping atoms in dark spots, reducing photon scattering or motional heating.…”

Section: Introductionmentioning

confidence: 99%

Polarization-dependent atomic dipole traps behind a circular aperture for neutral-atom quantum computing

Gillen

Copsey

2011

Phys. Rev. A

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The neutral-atom quantum computing community has successfully implemented almost all necessary steps for constructing a neutral-atom quantum computer. We present computational results of a study aimed at solving the remaining problem of creating a quantum memory with individually addressable sites for quantum computing. The basis of this quantum memory is the diffraction pattern formed by laser light incident on a circular aperture. Very close to the aperture, the diffraction pattern has localized bright and dark spots that can serve as red-detuned or blue-detuned atomic dipole traps. These traps are suitable for quantum computing even for moderate laser powers. In particular, for moderate laser intensities (∼100 W/cm 2 ) and comparatively small detunings (∼1000-10 000 linewidths), trap depths of ∼1 mK and trap frequencies of several to tens of kilohertz are achieved. Our results indicate that these dipole traps can be moved by tilting the incident laser beams without significantly changing the trap properties. We also explored the polarization dependence of these dipole traps. We developed a code that calculates the trapping potential energy for any magnetic substate of any hyperfine ground state of any alkali-metal atom for any laser detuning much smaller than the fine-structure splitting for any given electric field distribution. We describe details of our calculations and include a summary of different notations and conventions for the reduced matrix element and how to convert it to SI units. We applied this code to these traps and found a method for bringing two traps together and apart controllably without expelling the atoms from the trap and without significant tunneling probability between the traps. This approach can be scaled up to a two-dimensional array of many pinholes, forming a quantum memory with single-site addressability, in which pairs of atoms can be brought together and apart for two-qubit gates for quantum computing.

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“…The duration of the plasmonic mirror was 2 ms and the CCD integration time was 1 ms. Each image is averaged over 40 runs of the experiment. metallic structured film from the incoming laser beam, as in the optical trap based on the micro-Fresnel lens in gold [26]. As a next step toward a compact atom chip, we are planning to build a surface trap based on the plasmonic grating mirror with ultracold atoms, where subwavelength waveguides and focusing of SPPs is also under consideration [27].…”

mentioning

confidence: 99%

Optical dipole mirror for cold atoms based on a metallic diffraction grating

et al. 2014

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We report on the realization of a plasmonic dipole mirror for cold atoms based on a metallic grating coupler. A cloud of atoms is reflected by the repulsive potential generated by surface plasmon polaritons (SPPs) excited on a reflection gold grating by a 780 nm laser beam. Experimentally and numerically determined mirror efficiencies are close to 100%. The intensity of SPPs above a real grating coupler and the atomic trajectories, as well as the momentum dispersion of the atom cloud being reflected, are computed. A suggestion is given as to how the plasmonic mirror might serve as an optical atom chip.

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All-optical atom surface traps implemented with one-dimensional planar diffractive microstructures

Cited by 7 publications

References 18 publications

Zone-plate focusing of Bose–Einstein condensates for atom optics and erasable high-speed lithography of quantum electronic components

Zone-plate focusing of Bose–Einstein condensates for atom optics and erasable high-speed lithography of quantum electronic components

Polarization-dependent atomic dipole traps behind a circular aperture for neutral-atom quantum computing

Optical dipole mirror for cold atoms based on a metallic diffraction grating

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