Atom transporting and routing by crossed waveguides on a chip
Phys. Rev. A 112, 013102 – Published 1 July, 2025
DOI: https://doi.org/10.1103/pdcw-c346
Abstract
The development of hybrid photonic-atomic chips (PACs) for trapping, guiding, and controlling single atoms on a chip has been limited by the lack of efficient methods for routing atoms between different optical waveguides. Here we propose an approach for extending single-waveguide atom trapping techniques to multiple-waveguide structures, enabling the realization of multiport hybrid PAC devices. We introduce inverted-rib waveguides to mitigate the scattering and interference of dipole trap lasers at waveguide crossings and utilize high-order optical waveguide modes for atom manipulation. Numerical simulations demonstrate stable atom transporting and routing using copropagating dipole trap lasers with tens of milliwatt power, providing a trap depth of 0.51 mK. This work contributes to the development of scalable PACs, opening avenues for advanced matter-wave manipulation and precision measurements.
