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A: Fachverband Atomphysik

A 34: Ultracold Atoms: Trapping and Cooling II (with Q)

A 34.1: Vortrag

Donnerstag, 26. März 2015, 14:30–14:45, P/H2

Trapping atoms with laser written waveguides — Dario Jukić, Thomas Pohl, and •Jörg Götte — Max-Planck-Insitut für Physik komplexer Systeme, Dresden

We show how simple waveguide structures written into fused silica with femtosecond lasers, can be operated to trap Caesium atoms in the evanescent field in close proximity to the fused silica to air interface. The use of the fundamental mode of red detuned light and two spatial modes of blue detuned light allows us to balance the attractive surface forces and to create a stable potential minimum a few hundred nanometers from the surface of the waveguide. The process is very flexible, cost effective and allows for the realisation of a variety of complex trapping geometries. Using counter propagating waves we can realise optical conveyor belts with this design which is why our setup lends itself ideally for integration in optical atom chips.