Heidelberg 2015 – wissenschaftliches Programm

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Q: Fachverband Quantenoptik und Photonik

Q 15: Poster: Quantum Optics and Photonics I

Q 15.39: Poster

Montag, 23. März 2015, 17:00–19:00, C/Foyer

Towards a degenerate quasi 2D gas of fermions near the BEC-BCS crossover — •Thomas Paintner, Daniel Hoffmann, Stefan Häusler, Wladimir Schoch, Wolfgang Limmer, Benjamin Deissler, and Johannes Hecker-Denschlag — Universität Ulm, Institut für Quantenmaterie, Deutschland

Here, we present the creation of a two-dimensional gas of ultracold fermions near the BEC-BCS crossover.

We prepared a sample of ultracold 6 Li atoms in the lowest two hyperfine states in a strong single beam optical dipole trap. For implementing a quasi 2D degenerate gas we focus a blue detuned TEM01 beam on our atoms [1].

To create the TEM01, we illuminate a π-phase plate with a high power laser at 532nm. In the far field a TEM01 profile is created. We can change the size of the TEM01 mode by changing the laser beam waist. Strong enough confinement of the atoms in the TEM01 laser field will freeze out the atomic motion in this direction, leading to a quasi 2D gas.

Reducing the dimension of the system is another major step towards the realization of an all optical 2D honeycomb lattice.

[1] Opt.Express 13, 2843-2851 (2005)

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