Fast and efficient loading of a Rb magneto-optical trap using light-induced atomic desorption

Atutov, S. N.; Calabrese, R.; Guidi, V.; Mai, Bo; Rudavets, A. G.; Scansani, E.; Tomassetti, L.; Biancalana, Valerio; Burchianti, Alessia; Marinelli, Carmela; Mariotti, E.; Moi, L.; Veronesi, S.

doi:10.1103/physreva.67.053401

Cited by 85 publications

(56 citation statements)

References 18 publications

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“…It is noted that LIAD in vapor cells was first observed for silane coatings (in particular, polydimethylsiloxane) on cell walls in the early 90s [19], and since then there have been many investigations [20][21][22][23] including desorption from a paraffin coating [24]. In this paper we do not discuss LIAD from polymer coatings, because its mechanism is probably different from the desorption from bare glass surfaces.…”

Section: Introductionmentioning

confidence: 99%

Classification of Light-Induced Desorption of Alkali Atoms in Glass Cells Used in Atomic Physics Experiments

Hatakeyama

Wilde

Fukutani

2006

e-J. Surf. Sci. Nanotechnol.

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We attempt to provide physical interpretations of light-induced desorption phenomena that have recently been observed for alkali atoms on glass surfaces of alkali vapor cells used in atomic physics experiments. We find that the observed desorption phenomena are closely related to recent studies in surface science, and can probably be understood in the context of these results. If classified in terms of the photon-energy dependence, the coverage and the bonding state of the alkali adsorbates, the phenomena fall into two categories: It appears very likely that the neutralization of isolated ionic adsorbates by photo-excited electron transfer from the substrate is the origin of the desorption induced by ultraviolet light in ultrahigh vacuum cells. The desorption observed in low temperature cells, on the other hand, which is resonantly dependent on photon energy in the visible light range, is quite similar to light-induced desorption stimulated by localized electronic excitation on metallic aggregates. More detailed studies of light-induced desorption events from surfaces well characterized with respect to alkali coverage-dependent ionicity and aggregate morphology appear highly desirable for the development of more efficient alkali atom sources suitable to improve a variety of atomic physics experiments.

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Section: Introductionmentioning

confidence: 99%

Classification of Light-Induced Desorption of Alkali Atoms in Glass Cells Used in Atomic Physics Experiments

Hatakeyama

Wilde

Fukutani

2006

e-J. Surf. Sci. Nanotechnol.

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“…One of the most remarkable applications of LIAD is the efficient loading of Magneto-Optical Traps (MOTs) [63,64] and atom chips [65,66]. This technique gained a renewed attention after [2,37]: the possibility of controlling and quickly modulating the background vapor density, in fact, it permits obtaining large trapped populations during the loading phase, while maintaining good ultra-high vacuum conditions in the following stages, thus without compromising the lifetime of the cold atoms sample.…”

Section: Liad From Organic Coatings For Cold Atomsmentioning

confidence: 99%

“…Once the desired MOT population is reached, in order to prevent reduction of the trap lifetime due to background collisions, the desorbing source is switched off and the vacuum system re-establishes the initial vacuum conditions. Pulsed photo-desorption from PDMS coating deposited on the inner surface of a Pyrex vacuum chamber was applied to the loading of an 85 Rb MOT [64]. The abrupt burst of atoms released in the vapor phase allowed fast loading of the magneto-optical trap at a remarkable rate of 2 × 10 8 s −1 , without relevant consequences on the vacuum conditions and hence on the lifetime of the MOT.…”

Section: Liad From Organic Coatings For Cold Atomsmentioning

confidence: 99%

Low Energy Atomic Photodesorption from Organic Coatings

et al. 2016

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Organic coatings have been widely used in atomic physics during the last 50 years because of their mechanical properties, allowing preservation of atomic spins after collisions. Nevertheless, this did not produce detailed insight into the characteristics of the coatings and their dynamical interaction with atomic vapors. This has changed since the 1990s, when their adsorption and desorption properties triggered a renewed interest in organic coatings. In particular, a novel class of phenomena produced by non-destructive light-induced desorption of atoms embedded in the coating surface was observed and later applied in different fields. Nowadays, low energy non-resonant atomic photodesorption from organic coatings can be considered an almost standard technique whenever large densities of atomic vapors or fast modulation of their concentration are required. In this paper, we review the steps that led to this widespread diffusion, from the preliminary observations to some of the most recent applications in fundamental and applied physics.

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“…This reloading of the atom sources means that the total number of atoms in the device can be reduced through recycling. Studies have shown an order of magnitude improvement of MOT loading rates with this technique 83,84 , and it has been used to make BECs, which are very sensitive to background gas collisions, in a single chamber 85 . In chip-scale systems the surface area is far too small for effective use of LIAD 86 but, as mentioned earlier, one can introduce high surface area materials 87,88 providing they can be degassed sufficiently prior to encapsulation.…”

Section: Atom Source and Controlmentioning

confidence: 99%

Contributed Review: The feasibility of a fully miniaturized magneto-optical trap for portable ultracold quantum technology

Rushton

Aldous

Himsworth

2014

Review of Scientific Instruments

103

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Experiments using laser cooled atoms and ions show real promise for practical applications in quantumenhanced metrology, timing, navigation, and sensing as well as exotic roles in quantum computing, networking and simulation. The heart of many of these experiments has been translated to microfabricated platforms known as atom chips whose construction readily lend themselves to integration with larger systems and future mass production. To truly make the jump from laboratory demonstrations to practical, rugged devices, the complex surrounding infrastructure (including vacuum systems, optics, and lasers) also needs to be miniaturized and integrated. In this paper we explore the feasibility of applying this approach to the Magneto-Optical Trap; incorporating the vacuum system, atom source and optical geometry into a permanently sealed microlitre system capable of maintaining 10 −10 mbar for more than 1000 days of operation with passive pumping alone. We demonstrate such an engineering challenge is achievable using recent advances in semiconductor microfabrication techniques and materials.PACS numbers: 07.07.Df, 37.10.Gh, 07.30.Kf, I. ULTRACOLD QUANTUM TECHNOLOGYSince the first demonstrations of atoms and ions at sub-millikelvin temperatures in the mid-1980s, the field of atomic physics has been revolutionized by laser cooling and trapping as it provides researchers with a method to probe some of the purest and sensitive quantum systems available. This field is still highly productive and recently has put significant emphasis on the practical applications of this technology beyond the laboratory 1,2 . It was evident very early on that ultracold matter would be an indispensable tool in precise timing applications and a recent demonstration 3 has shown extremely low instabilities at the 10 −18 level. The wavelike nature of atoms as they are cooled to lower temperatures can be used to form atomic interferometers that outperform optical counterparts in measurements of accelerated reference frames 4-7 , which are important for inertial guidance systems, but can also provide sensitive measurements of mass, charge and magnetic fields [8][9][10][11] . Greater sensitivity beyond the classical limit is possible via squeezed 12 and entangled states 13-15 , which are also fundamental attributes for quantum computing 16,17 , and long distance quantum networking 18 . Ultracold matter has been used in the emerging field of quantum simulation 19 and is an indispensable tool in determining fundamental constants 20 , testing general relativity 21 and defining measurement standards 22 . Many researchers and industries believe such tools will be a major part of the 'second quantum revolution' in which the more 'exotic' properties of quantum physics are applied for practical applications 23,24 .The field of ultracold matter has reached a matua) m.d.himsworth@soton.ac.uk rity in both experimental methods and theoretical understanding allowing experiments to begin leaving the laboratory 25-27 . These systems are bespoke, rarely take up a ...

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Fast and efficient loading of a Rb magneto-optical trap using light-induced atomic desorption

Cited by 85 publications

References 18 publications

Classification of Light-Induced Desorption of Alkali Atoms in Glass Cells Used in Atomic Physics Experiments

Classification of Light-Induced Desorption of Alkali Atoms in Glass Cells Used in Atomic Physics Experiments

Low Energy Atomic Photodesorption from Organic Coatings

Contributed Review: The feasibility of a fully miniaturized magneto-optical trap for portable ultracold quantum technology

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