Nanostructured optical nanofibres for atom trapping

Abstract

We propose an optical dipole trap for cold neutral atoms based on the electric field produced from the evanescent fields in a hollow rectangular slot cut through an optical nanofibre. In particular, we discuss the trap performance in relation to laser-cooled rubidium atoms and show that a far off-resonance, blue-detuned field combined with the attractive surface-atom interaction potential from the dielectric material forms a stable trapping configuration. With the addition of a red-detuned field, we demonstrate how three dimensional confinement of the atoms at a distance of 140 - 200 nm from the fibre surface within the slot can be accomplished. This scheme facilitates optical coupling between the atoms and the nanofibre that could be exploited for quantum communication schemes using ensembles of laser-cooled atoms.

18 pages, 13 figures

References in corpus (4)

• Blue-detuned evanescent field surface traps for neutral atoms based on mode interference in ultra-thin optical fibres
• Shaping the evanescent field of optical nanofibers for cold atom trapping
• A low-loss photonic silica nanofiber for higher-order modes
• Optical wire trap for cold neutral atoms

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