Integrated optical components on atom chips

Eriksson, S.; Trupke, Michael; Powell, Hebe; Sahagún, Daniel; Sinclair, C.D.J.; Curtis, E. A.; Sauer, B. E.; Hinds, E. A.; Moktadir, Zakaria; Gollasch, Carsten O.; Kraft, Michaël

doi:10.1140/epjd/e2005-00092-x

Cited by 44 publications

(40 citation statements)

References 23 publications

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“…An optical technique for loading atoms into quantum adsorption states of a dielectric surface has been suggested [2,3]. The possibility to control and manipulate individual atoms near surfaces can find applications for quantum information [6,7,8] and atom chips [9,10]. Cold atoms can be used as a probe that is very sensitive to the surface-induced perturbations [11].…”

Section: Introductionmentioning

confidence: 99%

Spontaneous radiative decay of translational levels of an atom near a dielectric surface

Kien

Hakuta

2007

Phys. Rev. A

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We study spontaneous radiative decay of translational levels of an atom in the vicinity of a semi-infinite dielectric. We systematically derive the microscopic dynamical equations for the spontaneous decay process. We calculate analytically and numerically the radiative linewidths and the spontaneous transition rates for the translational levels. The roles of the interference between the emitted and reflected fields and of the transmission into the evanescent modes are clearly identified. Our numerical calculations for the silica-cesium interaction show that the radiative linewidths of the bound excited levels with large enough but not too large vibrational quantum numbers are moderately enhanced by the emission into the evanescent modes and those for the deep bound levels are substantially reduced by the surface-induced red shift of the transition frequency.

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Section: Introductionmentioning

confidence: 99%

Spontaneous radiative decay of translational levels of an atom near a dielectric surface

Kien

Hakuta

2007

Phys. Rev. A

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“…These light and magnetic chips technologies complement each other nicely, as demonstrated by the new generation of combined atom chips [21,22]. This paper introduces another approach to the construction of near-surface all-light atom optics elements based on the interference between multiple copropagating laser beams.…”

Section: Introductionmentioning

confidence: 99%

Coherent manipulation of atoms by copropagating laser beams

Ovchinnikov

2006

Phys. Rev. A

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Optical dipole traps and fractional Talbot optical lattices based on the interference between multiple co-propagating laser beams are proposed. The variation of relative amplitudes and phases of the interfering light beams of these traps makes it possible to manipulate the spatial position of trapped atoms. Examples of spatial translation and splitting of atoms between a set of the interference traps are considered. The prospect of constructing all-light atom chips based on the proposed technique is presented.

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“…In addition, it promises new devices that take advantage of the elementary quantum nature of atoms [7][8][9] [16][17][18] or otherwise attached [19] to a chip. A pair of these fibres looking into each other can be used to detect an atom cloud and can reach close to single atom sensitivity [17]. When reflective coatings are added, the gap between two fibres [1,20] or between one fibre and a micro-fabricated mirror [21] becomes a Fabry-Perot resonator.…”

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confidence: 99%

“…This atom-chip technology provides a way to miniaturise existing atomic physics devices. In addition, it promises new devices that take advantage of the elementary quantum nature of atoms [7][8][9] [16][17][18] or otherwise attached [19] to a chip. A pair of these fibres looking into each other can be used to detect an atom cloud and can reach close to single atom sensitivity [17].…”

mentioning

confidence: 99%

“…Millimetre-sized vapour cells have enabled optical spectroscopy [13], clocks [14] and magnetometry [14] on a chip, and etched mirrors on a silicon wafer have been used to integrate magneto-optical traps [15]. On a scale ten times smaller, several groups have explored how optical fibres, typically 125 µm in diameter, may be glued [16][17][18] or otherwise attached [19] to a chip. A pair of these fibres looking into each other can be used to detect an atom cloud and can reach close to single atom sensitivity [17].…”

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confidence: 99%

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An array of integrated atom–photon junctions

et al. 2010

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[1,2] efficient. In this letter we present the first waveguide chip designed to address a BEC along a row of independent junctions, which are separated by only 10 µm and have large atom-photon coupling. We describe the fully integrated, scalable design and demonstrate 11 junctions working as intended, using a low density cold atom cloud with as little as one atom on average in any one junction. Our device opens new possibilities for engineering quantum states of matter and light on a microscopic scale.Micro-fabricated chips are widely used to control clouds of ultra-cold atoms and BoseEinstein condensates [3,4]. Recently, the idea has been extended to the control of ions [5] and similar possibilities exist for molecules [6]. This atom-chip technology provides a way to miniaturise existing atomic physics devices. In addition, it promises new devices that take advantage of the elementary quantum nature of atoms [7][8][9] [16][17][18] or otherwise attached [19] to a chip. A pair of these fibres looking into each other can be used to detect an atom cloud and can reach close to single atom sensitivity [17]. When reflective coatings are added, the gap between two fibres [1,20] or between one fibre and a micro-fabricated mirror [21] becomes a Fabry-Perot resonator. Similarly, a fibre can be coupled to a micro-disk resonator [22,23]. These devices can achieve strong atom-photon coupling for applications in quantum information processing.This letter reports a further order of magnitude scale reduction, in which the 125 µm-diameter optical fibre is replaced by an integrated waveguide only 10 µm across, with a 4 µm square core. Since a BEC is typically ∼ 100 µm long, this size reduction opens the new 3 possibility of intersecting a BEC with many closely spaced atom-photon junctions of high coupling strength. In our device, illustrated in Figure 1, a trench containing the cold atoms cuts through an array of 12 waveguides spaced by 10 µm. This design is a significant advance in the way that photons can be coupled to ultracold atoms.In order to characterise the chip, we have released cold atoms into a junction to measure its sensitivity and to demonstrate the basics of its operation. Every few seconds, 87 Rb atoms are cooled and collected from a room-temperature vapour by a Low-Velocity Intense Source (LVIS), then transferred to a magneto-optical trap (MOT) about 4 mm from the chip surface, where the atom density is up to 4 × 10 −2 atoms/µm 3 and the temperature is ∼ 100µK. We push this cloud towards the chip just before switching off the MOT light and magnetic field, thereby launching the atoms at 40 cm/s into the trench. The light beams from the waveguides diverge only slightly as they cross the trench, with w -the 1/e radius of the field -growing from 2.2 µm to 2.8 µm. Since the width of the trench is L = 16 µm, any given beam interacts with roughly one to four atoms of the cloud as they pass through.Each atom crosses the light in ∼ 7 µs, scattering up to 130 photons (the fully saturated rate is Γ/2 = 1.9 × 10 7 s −1 ).Wi...

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Integrated optical components on atom chips

Cited by 44 publications

References 23 publications

Spontaneous radiative decay of translational levels of an atom near a dielectric surface

Spontaneous radiative decay of translational levels of an atom near a dielectric surface

Coherent manipulation of atoms by copropagating laser beams

An array of integrated atom–photon junctions

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