Light-induced ejection of alkali atoms in polysiloxane coated cells

Gozzini, A.; Mango, F.; Xu, Jianhe; Alzetta, G.; Maccarrone, Francesco; Bernheim, R. A.

doi:10.1007/bf02482437

Cited by 110 publications

(73 citation statements)

References 5 publications

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“…The primary drawback of this vapor-cell MOT (VCMOT) is that the lifetime of the magnetically trapped atoms is limited by collisions with hot atoms from the vapor, thus limiting the time available for experiment. One approach to overcome this limitation is pulsed loading, starting from an alkali getter dispenser [17] or by ultraviolet light induced desorption [18,19]. All other solutions involve a dual chamber arrangement in which a source chamber, containing some variation of the VCMOT source, is separated by a differential pumping channel from an ultra-high-vacuum (UHV) chamber in which the atoms are recaptured in a secondary MOT in preparation for experiments under UHV conditions .…”

Section: Introductionmentioning

confidence: 99%

High-flux two-dimensional magneto-optical-trap source for cold lithium atoms

et al. 2009

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We demonstrate a novel 2D MOT beam source for cold 6 Li atoms. The source is side-loaded from an oven operated at temperatures in the range 600 T 700 K. The performance is analyzed by loading the atoms into a 3D MOT located 220 mm downstream from the source. The maximum recapture rate of ∼ 10 9 s −1 is obtained for T ≈ 700 K and results in a total of up to 10 10 trapped atoms. The recaptured fraction is estimated to be 30 ± 10% and limited by beam divergence. The most-probable velocity in the beam (αz) is varied from 18 to 70 m/s by increasing the intensity of a push beam. The source is quite monochromatic with a full-width at half maximum velocity spread of 11 m/s at αz = 36 m/s, demonstrating that side-loading completely eliminates beam contamination by hot vapor from the oven. We identify depletion of the low-velocity tail of the oven flux as the limiting loss mechanism. Our approach is suitable for other atomic species.

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Section: Introductionmentioning

confidence: 99%

High-flux two-dimensional magneto-optical-trap source for cold lithium atoms

et al. 2009

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“…37 Rubidium atoms adsorb less strongly to quartz than to gold and are more easily removed via light-induced atomic desorption (LIAD) with blue or ultraviolet light. 38,39 The corners of the chip are left uncoated with quartz so that the gold surface can be electrically grounded to the mount.…”

Section: B Reflective and Protective Coatingsmentioning

confidence: 99%

Magnetic-film atom chip with 10 μm period lattices of microtraps for quantum information science with Rydberg atoms

Leung

Pijn

Schlatter

et al. 2014

Review of Scientific Instruments

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We describe the fabrication and construction of a setup for creating lattices of magnetic microtraps for ultracold atoms on an atom chip. The lattice is defined by lithographic patterning of a permanent magnetic film. Patterned magnetic-film atom chips enable a large variety of trapping geometries over a wide range of length scales. We demonstrate an atom chip with a lattice constant of 10 μm, suitable for experiments in quantum information science employing the interaction between atoms in highly excited Rydberg energy levels. The active trapping region contains lattice regions with square and hexagonal symmetry, with the two regions joined at an interface. A structure of macroscopic wires, cutout of a silver foil, was mounted under the atom chip in order to load ultracold 87 Rb atoms into the microtraps. We demonstrate loading of atoms into the square and hexagonal lattice sections simultaneously and show resolved imaging of individual lattice sites. Magnetic-film lattices on atom chips provide a versatile platform for experiments with ultracold atoms, in particular for quantum information science and quantum simulation. © 2014 AIP Publishing LLC.

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“…We trap ∼ 5 × 10 7 atoms in 2.5 s. The loading time can be reduced by increasing the Rubidium background pressure when a larger atom number needs to be trapped using e.g. ultraviolet LEDs to temporarly increase the hot gas pressure during the MOT loading -the so-called light-induced atomic desorption (LIAD) [24,25]. The cooling laser detuning is −3 Γ and the temperature of the cloud is ∼ 55 µK.…”

Section: Parameters and Experimental Sequencementioning

confidence: 99%

Fast compression of a cold atomic cloud using a blue-detuned crossed dipole trap

et al. 2012

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We present the experimental realization of a compressible blue detuned crossed dipole trap for cold atoms allowing for fast dynamical compression (∼ 5 − 10 ms) of 5 × 10 7 Rubidium atoms up to densities of ∼ 10 13 cm −3 . The dipole trap consists of two intersecting tubes of blue-detuned laser light. These tubes are formed using a single, rapidly rotating laser beam which, for sufficiently fast rotation frequencies, can be accurately described by a quasi-static potential. The atomic cloud is compressed by dynamically reducing the trap volume leading to densities close to the Ioffe-Reggel criterion for light localization.

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Light-induced ejection of alkali atoms in polysiloxane coated cells

Cited by 110 publications

References 5 publications

High-flux two-dimensional magneto-optical-trap source for cold lithium atoms

High-flux two-dimensional magneto-optical-trap source for cold lithium atoms

Magnetic-film atom chip with 10 μm period lattices of microtraps for quantum information science with Rydberg atoms

Fast compression of a cold atomic cloud using a blue-detuned crossed dipole trap

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