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

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

doi:10.1103/physrevapplied.11.064023

Cited by 49 publications

(38 citation statements)

References 57 publications

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“…Differential pumping between the atom source and science chamber would improve the vacuum level and reduce the loss rate from the MOT. Additionally, higher loading rates can be achieved in a gMOT by loading atoms along the axial direction of the grating [17]. To improve our understanding of the single-beam geometry for cooling on narrow linewidth transitions we plan an in-depth study based on Monte-Carlo simulations.…”

Section: Discussionmentioning

confidence: 99%

“…Compact and scalable devices for cooling and trapping of atoms at a single wavelength have recently been demonstrated in the form of grating magneto-optical traps (gMOTs) [14][15][16][17][18], where one incident laser beam produces secondary beams via diffraction on a set of gratings. Combined, these beams lead to cooling and confinement of the atoms above the gratings when used in conjunction with a suitable magnetic quadrupole field.…”

Section: Introductionmentioning

confidence: 99%

“…The difference in diffraction angle leads to a spatial shift of the trapping volumes complicating transfer from the first to the second cooling stage. Furthermore, in a gMOT design it is generally desirable to have a low 0 th -order diffraction efficiency for the incident light, which is often achieved by choosing a grating height that corresponds to a quarter of the incident wavelength [17,20,21] and cannot be fulfilled for both wavelengths simultaneously. Additionally, the optimum diffraction efficiency in 1 st -order is fixed by the number of grating segments and should be identical for transverse electric (TE) and transverse magnetic (TM) polarization components.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Two-color grating magneto-optical trap for narrow-line laser cooling

Bondza¹,

Lisdat²,

Kroker³

et al. 2021

Preprint

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We demonstrate for the first time the two-color cooling and trapping of alkaline-earth atoms in a grating magneto-optical trap (gMOT). The trap is formed by a single incident laser beam together with four secondary beams that are generated via diffraction from a nanostructured wafer. A grating structure for a gMOT operating with strontium atoms is optimized and fabricated. We trap 10 6 88 Sr atoms on the 1 S 0 → 1 P 1 transition at 461 nm and transfer 25 % of these atoms to the second cooling stage on the narrower 1 S 0 → 3 P 1 intercombination transition at 689 nm, preparing a sample of 2.5 × 10 5 atoms at 5 µK. These results demonstrate for the first time the applicability of the gMOT technology in conjunction with two widely differing wavelengths and enable the continued miniaturization of alkaline-earth based quantum technologies like optical atomic clocks.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Two-color grating magneto-optical trap for narrow-line laser cooling

Bondza¹,

Lisdat²,

Kroker³

et al. 2021

Preprint

View full text Add to dashboard Cite

show abstract

“…In recent years, significant efforts have been made to address the scalability of cold-atom instruments 18 , 19 , even resulting in the commercialization of compact cold-atom clocks and sensors. Designs for chip-scale cold-atom systems have also been proposed 20 and demonstrated, including novel ways of redirecting laser beams to trap atoms such as the pyramid MOT 21 , 22 and grating-MOT (GMOT) 23 – 25 , as well as density regulators 26 , 27 and low-power coils 28 . Progress has also been recently reported on the development of chip-scale ion pumps 29 .…”

Section: Introductionmentioning

confidence: 99%

Enhanced observation time of magneto-optical traps using micro-machined non-evaporable getter pumps

Boudot

McGilligan

Moore³

et al. 2020

Sci Rep

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We show that micro-machined non-evaporable getter pumps (NEGs) can extend the time over which laser cooled atoms can be produced in a magneto-optical trap (MOT), in the absence of other vacuum pumping mechanisms. In a first study, we incorporate a silicon-glass microfabricated ultra-high vacuum (UHV) cell with silicon etched NEG cavities and alumino–silicate glass (ASG) windows and demonstrate the observation of a repeatedly-loading MOT over a 10 min period with a single laser-activated NEG. In a second study, the capacity of passive pumping with laser activated NEG materials is further investigated in a borosilicate glass-blown cuvette cell containing five NEG tablets. In this cell, the MOT remained visible for over 4 days without any external active pumping system. This MOT observation time exceeds the one obtained in the no-NEG scenario by almost five orders of magnitude. The cell scalability and potential vacuum longevity made possible with NEG materials may enable in the future the development of miniaturized cold-atom instruments.

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“…The optomechanical design of the small form-factor sensor head supports a miniaturized Ti vacuum package and provides optical access for laser cooling and trapping, the Raman lasers, and fluorescence detection of the atoms. A GMOT [58][59][60][61][62][63][64] is chosen for the production of cold 87 Rb atoms for the LPAI due to its simplified construction, elimination of unnecessary mechanical degrees-of-freedom, and superior optical access while only requiring a single cooling beam (see 2/17…”

mentioning

confidence: 99%

A Cold-Atom Interferometer with Microfabricated Gratings and a Single Seed Laser

Lee

Ding²,

Christensen³

et al. 2021

Preprint

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The extreme miniaturization of a cold-atom interferometer accelerometer requires the development of novel technologies and architectures for the interferometer subsystems. We describe several component technologies and a laser system architecture to enable a path to such miniaturization. We developed a custom, compact titanium vacuum package containing a microfabricated grating chip for a tetrahedral grating magneto-optical trap (GMOT) using a single cooling beam. The vacuum package is integrated into the optomechanical design of a compact cold-atom sensor head with fixed optical components. In addition, a multichannel laser system driven by a single seed laser has been implemented with time-multiplexed frequency shifting using single sideband modulators, reducing the number of optical channels connected to the sensor head. This laser system architecture is compatible with a highly miniaturized photonic integrated circuit approach, and by demonstrating atom-interferometer operation with this laser system, we show feasibility for the integrated photonic approach. In the compact sensor head, sub-Doppler cooling in the GMOT produces 15 μK temperatures, which can operate at a 20 Hz data rate for the atom interferometer sequence. After validating atomic coherence with Ramsey interferometry, we demonstrate a light-pulse atom interferometer in a gravimeter configuration without vibration isolation for 10 Hz measurement cycle rate and T = 0 - 4.5 ms interrogation time, resulting in Δg/g = 2.0e-6. All these efforts demonstrate progress towards deployable cold-atom inertial sensors under large amplitude motional dynamics.

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

Cited by 49 publications

References 57 publications

Two-color grating magneto-optical trap for narrow-line laser cooling

Two-color grating magneto-optical trap for narrow-line laser cooling

Enhanced observation time of magneto-optical traps using micro-machined non-evaporable getter pumps

A Cold-Atom Interferometer with Microfabricated Gratings and a Single Seed Laser

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