Light-induced atomic desorption of lithium

Barker, Daniel S.; Norrgard, Eric; Scherschligt, Julia; Fedchak, James A.; Eckel, Stephen

doi:10.1103/physreva.98.043412

Cited by 15 publications

(9 citation statements)

References 58 publications

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“…However, UV light also desorbs other, unwanted species from surfaces, such as water and oxygen [49, 50, 51], increasing their background gas pressures. In a recent experiment [48], we observed that the increase in pressure due to unwanted gasses is significantly smaller than our low-outgasssing lithium dispensor. In addition, light-assisted desorption should be nearly instantaneous with application of the light, eliminating the need for a mechanical shutter.…”

Section: Details Of the Planned Devicementioning

confidence: 49%

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Challenges to miniaturizing cold atom technology for deployable vacuum metrology

et al. 2018

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Cold atoms are excellent metrological tools; they currently realize SI time and, soon, SI pressure in the ultra-high (UHV) and extreme high vacuum (XHV) regimes. The development of primary, vacuum metrology based on cold atoms currently falls under the purview of national metrology institutes. Under the emerging paradigm of the “quantum-SI”, these technologies become deployable (relatively easy-to-use sensors that integrate with other vacuum chambers), providing a primary realization of the pascal in the UHV and XHV for the end-user. Here, we discuss the challenges that this goal presents. We investigate, for two different modes of operation, the expected corrections to the ideal cold-atom vacuum gauge and estimate the associated uncertainties. Finally, we discuss the appropriate choice of sensor atom, the light Li atom rather than the heavier Rb.

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Section: Details Of the Planned Devicementioning

confidence: 49%

“…We are also considering other more speculative sources of lithium. Lithium, like other alkali-metal atoms, can be desorbed from surfaces using UV light [48]. However, UV light also desorbs other, unwanted species from surfaces, such as water and oxygen [49, 50, 51], increasing their background gas pressures.…”

Section: Details Of the Planned Devicementioning

confidence: 99%

Challenges to miniaturizing cold atom technology for deployable vacuum metrology

et al. 2018

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“…Our design can easily be adapted to serve as cold gas source for a variety of applications. By implementing differential pumping or using a low-outgassing atom source (rather than a dispenser) [46,47], our device could be used as a primary vacuum gauge [9,10]. The diffraction grating period and etch depth can be altered to optimize trapping of other elements, such as Rb, Cs, Ca, Sr, or Yb.…”

Section: Discussionmentioning

confidence: 99%

Single-Beam Zeeman Slower and Magneto-Optical Trap Using a Nanofabricated Grating

et al. 2019

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We demonstrate a compact (0.25 L) system for laser cooling and trapping atoms from a heated dispenser source. Our system uses a nanofabricated diffraction grating to generate a magnetooptical trap (MOT) using a single input laser beam. An aperture in the grating allows atoms from the dispenser to be loaded from behind the chip, increasing the interaction distance of atoms with the cooling light. To take full advantage of this increased distance, we extend the magnetic field gradient of the MOT to create a Zeeman slower. The MOT traps approximately 10 6 7 Li atoms emitted from an effusive source with loading rates greater than 10 6 s −1 . Our design is portable to a variety of atomic and molecular species and could be a principal component of miniaturized cold-atom-based technologies.

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“…To produce a gated cloud of atoms one can employ the light-induced atomic-desorption (LIAD) process. In the LIAD process, also known as the photo-electric effect for atoms, high energy laser pulses hit the wall of an atomic vapor cell, which is coated with alkali atoms and desorb them from the surface [38][39][40][41] . The inset of Fig.…”

Section: Atom-light Interactions and Monte-carlo Simulationsmentioning

confidence: 99%

Cavity QED based on room temperature atoms interacting with a photonic crystal cavity: a feasibility study

et al. 2020

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The paradigm of cavity QED is a two-level emitter interacting with a high quality factor single mode optical resonator. The hybridization of the emitter and photon wave functions mandates large vacuum Rabi frequencies and long coherence times; features that so far have been successfully realized with trapped cold atoms and ions and localized solid state quantum emitters such as superconducting circuits, quantum dots, and color centers 1,2 . Thermal atoms on the other hand, provide us with a dense emitter ensemble and in comparison to the cold systems are more compatible with integration, hence enabling large-scale quantum systems. However, their thermal motion and large transit time broadening is a major challenge that has to be circumvented. A promising remedy could benefit from the highly controllable and tunable electromagnetic fields of a nano-photonic cavity with strong local electric-field enhancements. Utilizing this feature, here we calculate the interaction between fast moving, thermal atoms and a nano-beam photonic crystal cavity (PCC) with large quality factor and small mode volume. Through fully quantum mechanical calculations, including Casimir-Polder potential (i.e. the effect of the surface on radiation properties of an atom) we show, when designed properly, the achievable coupling between the flying atom and the cavity photon would be strong enough to lead to Rabi flopping in spite of short interaction times. In addition, the time-resolved detection of different trajectories can be used to identify single and multiple atom counts. This probabilistic approach will find applications in cavity QED studies in dense atomic media and paves the way towards realizing coherent quantum control schemes in large-scale macroscopic systems aimed at out of the lab quantum devices.

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Light-induced atomic desorption of lithium

Cited by 15 publications

References 58 publications

Challenges to miniaturizing cold atom technology for deployable vacuum metrology

Challenges to miniaturizing cold atom technology for deployable vacuum metrology

Single-Beam Zeeman Slower and Magneto-Optical Trap Using a Nanofabricated Grating

Cavity QED based on room temperature atoms interacting with a photonic crystal cavity: a feasibility study

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