Robust characterization of microfabricated atomic beams on a six-month time scale

Li, Chao; Wei, Bochao; Chai, Xiao; Yang, Jeremy; Daruwalla, Anosh; Ayazi, Farrokh; Raman, Chandra

doi:10.1103/physrevresearch.2.023239

Cited by 7 publications

(12 citation statements)

References 48 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The near-axis ux is similar to that of a "cosine" emitter for angles less than a/L from normal, and the total ux through the capillary array , where is the transmission probability of the channel, is the Rb density is the source region, is the mean thermal speed of the atoms, and is the cross-sectional area of the capillary array. More complex capillary geometries such as the non-parallel or cascaded collimators can be used to further engineer the beam pro le or reduce off-axis ux 1,17 .…”

Section: Resultsmentioning

confidence: 99%

A chip-scale atomic beam clock

Martinez

Staron

et al. 2023

Preprint

Self Cite

View full text Add to dashboard Cite

Atomic beams are a longstanding technology for atom-based sensors and clocks with widespread use in commercial frequency standards. Here, we report the demonstration a chip-scale microwave atomic beam clock using coherent population trapping (CPT) interrogation in a passively pumped atomic beam device. The beam device consists of a hermetically sealed vacuum cell fabricated from an anodically bonded stack of glass and Si wafers. Atomic beams are created using a lithographically defined microcapillary array connected to a Rb reservoir1 and propagate in a 15 mm long drift cavity. We present a detailed characterization of the atomic beam performance (total Rb flux ≈ 7.7 × 1011 s-1 at 363 K device temperature) and of the vacuum environment in the device (pressure < 1 Pa), which is sustained using getter materials which pump residual gases and Rb vapor. A chip-scale beam clock is realized using Ramsey CPT spectroscopy of the 87Rb ground state hyperfine transition over a 10 mm Ramsey distance in the atomic beam device. The prototype atomic beam clock demonstrates a fractional frequency stability of ≈ 1.2 × 10-9/√τ for integration times τ from 1 s to 250 s, limited by detection noise. Optimized atomic beam clocks based on this approach may exceed the long-term stability of existing chip-scale clocks, and leading long-term systematics are predicted to limit the ultimate fractional frequency stability below 10-12.

show abstract

Section: Resultsmentioning

confidence: 99%

A chip-scale atomic beam clock

Martinez

Staron

et al. 2023

Preprint

Self Cite

View full text Add to dashboard Cite

show abstract

“…This limits the duty cycle of quantum devices based on atoms and photons. By contrast, laser slowed, or even in some cases, fast thermal atomic beams possess many of the prerequisites for quantum device fabrication [8,9].…”

Section: Introductionmentioning

confidence: 99%

High Quality factor micro-ring resonator for strong atom-light interactions using miniature atomic beams

Dorche,

Wei,

Raman

et al. 2020

Preprint

Self Cite

View full text Add to dashboard Cite

An integrated photonic platform is proposed for strong interactions between atomic beams and annealing-free high-quality-factor (Q) microresonators. We fabricated a thin-film, air-clad SiN microresonator with a loaded Q of 1.55 × 10 6 around the optical transition of 87 Rb at 780 nm. This Q is achieved without annealing the devices at high temperatures, enabling future fully integrated platforms containing optoelectronic circuitry as well. The estimated single-photon Rabi frequency (2g) is 2π×64 MHz at a height of 100 nm above the resonator. Our simulation result indicates that miniature atomic beams with a longitudinal speed of 0.2 m/s to 30 m/s will strongly interact with our resonator, allowing for the detection of single-atom transits and the realization of scalable single-atom photonic devices. Racetrack resonators with a similar Q can be used to detect thermal atomic beams with velocities around 300 m/s.

show abstract

“…Figure 1 The spectrum is a convolution between the scattering rate R sc and the atoms' transverse Doppler distribution n(v t ). Using the deconvolution technique 16 , and given our laser intensity I = 2 mW with beam size w = 0.586 mm, we can deduce the transverse speed distribution as shown in Fig. 2 (b).…”

mentioning

confidence: 99%

“…The FWHM for the transverse speed distribution is around 120 m/s. The deconvolution process here only considered a single F = 2 to F = 3 hyperfine level, while the F = 2 to F = 2, 1 transitions contribute to the asymmetric shape around −200 m/s 16 .…”

mentioning

confidence: 99%

“…Here, R sc is the scattering rate function that depends on the saturation parameter s and ∆ = δ − kv sin(θ + α), δ is the laser detuning, v is the atom velocity, θ is the polar angle, and α is the tilted angle 22 • , F(v) is the Maxwell-Boltzmann distribution with temperature as the fitting parameter, and κ f (θ ) is the angular distribution function associated with this silicon collimator which has been well studied 16 . By fitting our theoretical curve to the experimental data in us to monitor the temperature of the oven and independently confirm that the hot atoms from the dispenser thermalize with the collimator wall and oven wall first before emerging from the collimator.…”

mentioning

confidence: 99%

See 1 more Smart Citation

Collimated versatile atomic beam source with alkali dispensers

Wei,

Crawford,

Andeweg

et al. 2022

Preprint

Self Cite

View full text Add to dashboard Cite

Robust characterization of microfabricated atomic beams on a six-month time scale

Cited by 7 publications

References 48 publications

A chip-scale atomic beam clock

A chip-scale atomic beam clock

High Quality factor micro-ring resonator for strong atom-light interactions using miniature atomic beams

Collimated versatile atomic beam source with alkali dispensers

Contact Info

Product

Resources

About