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An integrated optical dipole trap uses two-color (red and blue-detuned)traveling evanescent wave fields for trapping cold neutral atoms. To achievelongitudinal confinement, we propose using an integrated optical waveguidecoupler, which provides a potential gradient along the beam propagationdirection sufficient to confine atoms. This integrated optical dipole trap cansupport an atomic ensemble with a large optical depth due to its small modearea. Its quasi-TE0 waveguide mode has an advantage over the HE11 mode of ananofiber, with little inhomogeneous Zeeman broadening at the trapping region.The longitudinal confinement eliminates the need for a 1-D optical lattice,reducing collisional blockaded atomic loading, potentially producing largerensembles. The waveguide trap allows for scalability and integrability withnano-fabrication technology. We analyze the potential performance of suchintegrated atom traps.

Integrated Optical Dipole Trap for Cold Neutral Atoms with an Optical Waveguide Coupler