2025/07/31 by Yuri B. Ovchinnikov, Ovchinnikov, Yuri B. · 1 citation
Engineering · Physics and Astronomy · #Applied Physics (physics.app-ph) #Atomic Physics (physics.atom-ph) #Cold Atom Physics and Bose-Einstein Condensates #FOS: Physical sciences #Mechanical and Optical Resonators #Photonic and Optical Devices #Quantum Physics (quant-ph)
paper · pdf · doi:10.48550/arxiv.2507.23352
openalex publication_date 2025/07/31 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
The trapping of ultracold atoms using two-colour evanescent light waves formed by propagating modes of suspended optical rib waveguides is modelled in different configurations. Reducing the anisotropy of the two-colour evanescent optical dipole potential requires two laser light components with a large frequency difference. The upper frequency is guided in the two lowest transverse waveguide modes and the lower frequency propagates in a single-mode regime. This increases the dipole potential depth in the lateral direction. An additional increase in the optical dipole potential can be achieved by tuning the frequencies of the two modes to two different atomic transitions. When applied to rubidium, the total depth of the corresponding surface optical dipole traps can reach 0.3 mK or above under reasonable conditions.