Robust characterization of microfabricated atomic beams on a sixmonth time scale
Abstract
Miniature atomic beams can provide new functionalities for atombased sensing instruments such as atomic clocks and interferometers. We recently demonstrated a planar silicon device for generating wellcollimated thermal atomic beams [Nat. Commun. 10, 1831 (2019), 10.1038/s41467019096473]. Here we present fluorescence spectroscopy studies on atomic beams emitted from an array of thin silicon capillaries. These microfabricated rubidium beams work stably over six months at different temperatures above 100 ∘C^{. At an oven temperature of 150 ∘C , the calibrated throughput of the miniature source is 7 ×1011 atoms/s/channel with a typical beam brightness of 6 ×1014 atoms per second per steradian per unit source area [s1sr1mm2 ]. We also present a recipe for evaluating the fluorescence spectra given the Monte Carlosimulated angular distribution function, even under conditions of strong laser saturation of the probing transition. Monte Carlo simulations together with multilevel master equation calculations fully account for the influence of optical pumping and spatial extension of the Gaussian laser beam. A notable consequence of this work is the agreement between theory and experimental data that has allowed fine details of the angular distribution of the collimator to be resolved over three decades of dynamic range of atomic beam output flux. }
 Publication:

Physical Review Research
 Pub Date:
 May 2020
 DOI:
 10.1103/PhysRevResearch.2.023239
 arXiv:
 arXiv:1911.06388
 Bibcode:
 2020PhRvR...2b3239L
 Keywords:

 Physics  Atomic Physics;
 Physics  Applied Physics;
 Quantum Physics
 EPrint:
 11 pages, 5 figures