Shaping the evanescent field of optical nanofibers for cold atom trapping

Abstract

We investigate trapping geometries for cold, neutral atoms that can be created in the evanescent field of a tapered optical fibre by combining the fundamental mode with one of the next lowest possible modes, namely the HE21 mode. Counter propagating red-detuned HE21 modes are combined with a blue-detuned HE11 fundamental mode to form a potential in the shape of four intertwined spirals. By changing the polar- ization from circular to linear in each of the two counter-propagating HE21 modes simultaneously the 4-helix configuration can be transformed into a lattice configuration. The modification to the 4-helix configuration due to unwanted excitation of the the T E01 and T M01 modes is also discussed.

9 pages, 5 figures

References in corpus (5)

• A heat-and-pull rig for fiber taper fabrication
• Blue-detuned evanescent field surface traps for neutral atoms based on mode interference in ultra-thin optical fibres
• A low-loss photonic silica nanofiber for higher-order modes
• Nanofiber-Based Double-Helix Dipole Trap for Cold Neutral Atoms
• Superfluid rotation sensor with helical laser trap

Cited by in corpus (19)

• Optical Micro- and Nanofiber Pulling Rig
• Optical Nanofibers: a new platform for quantum optics
• Optical nanofibres and neutral atoms
• Higher order microfibre modes for dielectric particle trapping and propulsion
• Nanostructured optical nanofibres for atom trapping
• Higher-order modes of vacuum-clad ultrathin optical fibers
• Interaction of laser-cooled ${}^{87}$Rb atoms with higher order modes of an optical nanofiber
• Optical wire trap for cold neutral atoms
• Nonlinear force dependence on optically bound micro-particle arrays in the eva-nescent fields of fundamental and higher order microfibre modes
• Channeling of spontaneous emission from an atom into the fundamental and higher-order modes of a vacuum-clad ultrathin optical fiber
• Proposal for stable atom trapping on a GaN-on-Sapphire chip
• Polarisation control for optical nanofibres by imaging through a single lens
• Static and dynamic phases of a Tonks-Girardeau gas in an optical lattice
• Controlled creation of three-dimensional vortex structures in Bose--Einstein condensates using artificial magnetic fields
• Creating superfluid vortex rings in artificial magnetic fields
• Optical trap for an atom around the midpoint between two coupled identical parallel optical nanofibers
• Non-adiabatic generation of NOON states in a Tonks--Girardeau gas
• Investigation of a ${}^{85}$Rb Dark Magneto-Optical Trap using an Optical Nanofibre
• Optical trapping with structured light