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Joint Conference of the European Frequency and Time Forum and IEEE International Frequency Control Symposium (EFTF/IFCS)

A Single Grating Chip-Based Magneto-Optical Trap and Optical Dipole for Atomic Standards

Shiming Wei, Yadong Zhou, Jifeng Qu, Chong Yan, Xiaochi Liu, Junyi Duan

Published May 12, 2025• 0 citations
Publisher

Abstract

Miniature cold atom system has been demonstrated application of compact quantum precision measurement. In this work, we propose a primary design of cold atom chip expected to achieve both magneto-optical traps and optical dipole trap. The phase modulation properties and diffraction efficiency is analyzed to effectively constrain neutral atoms in a optical dipole trap forming by a far red resonance Gaussian beam.

DOI
10.1109/eftf/ifcs64367.2025.11194563

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Miniature cold atom system has been demonstrated application of compact quantum precision measurement. In this work, we propose a primary design of cold atom chip expected to achieve both magneto-optical traps and optical dipole trap. The phase modulation properties and diffraction efficiency is analyzed to effectively constrain neutral atoms in a optical dipole trap forming by a far red resonance Gaussian beam.
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Abstract Diffraction gratings have simplified the optical implementation of magneto-optical traps (MOTs) to require only a single input beam, however reaching high atom number and fast loading has proven to be a challenge. We equipped an atom chip with a grating surface and paired it with a velocity-tunable 2D+-MOT as an atomic source to facilitate efficient loading together with magnetic trapping. Using uniform grating illumination, we magneto-optically trap 1.0 ( 1 ) × 10 9 atoms within one second, cool them to 14.1 ( 3 ) μ K , and transfer a quarter of them into the magnetic chip trap. This is a key step towards simple portable quantum sensors employing (ultra-)cold atoms.