TY - JOUR
AU1 - Li, Chao
AU2 - Chai, Xiao
AU3 - Zhuo, Linzhao
AU4 - Wei, Bochao
AU5 - Lotfi, Ardalan
AU6 - Ayazi, Farrokh
AU7 - Raman, Chandra
AB - Abstract:We have achieved stimulated laser cooling of thermal rubidium atomic beams on a silicon chip. Following pre-collimation via a silicon microchannel array, we perform beam brightening via a blue-detuned optical molasses. Owing to the small size of the chip elements, we require only 8 mW, or nine times lower power than earlier free-space experiments on cesium [Aspect et al., Phys. Rev. Lett. 57, 1688 (1986)]. Silicon micromirrors are fabricated and hand-assembled to precisely overlap a strong elliptical standing wave with a sheet-shaped atomic density distribution, with dimensions chosen precisely to match these. We reduce the transverse velocity spread to below 1 m/s within a total travel distance of 4.5 mm on a silicon substrate. We use Doppler-sensitive two-photon Raman spectroscopy to characterize the cooling. In contrast to time-of-flight methods utilized previously, this approach requires a much shorter apparatus to achieve similar resolution. This hybrid of passive and active collimation paves the way toward the construction of full-fledged atomic instruments, such as atomic beam clocks and gyroscopes, entirely on-chip through batch-fabricated processes.
TI - Stimulated Laser Cooling Using Microfabrication
JF - Quantum Physics
DO - 10.1103/physrevapplied.20.034042
DA - 2022-08-26
UR - https://www.deepdyve.com/lp/arxiv-cornell-university/stimulated-laser-cooling-using-microfabrication-LNlRnmlRCu
VL - 2023
IS - 2208
DP - DeepDyve
ER -