Berlin 2014 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 16: Poster: Quantum information, micromechanical oscillators, matter wave optics, precision measurements and metrology
Q 16.37: Poster
Montag, 17. März 2014, 16:30–18:30, Spree-Palais
Solid state laser system to studying topological defects in Coulomb crystals — •Philip Kiefer1, Jonathan Brox1, Haggai Landa2, Manuel Mielenz1, Benni Reznik2, and Tobias Schaetz1 — 1Atom-, Molekül- und optische Physik, Physikalisches Institut, Universität Freiburg, Hermann-Herder-Str. 3, 79104 Freiburg — 2School of Physics and Astronomy, Raymond and Beverly Sackler Faculty of Exact Sciences, Tel-Aviv University, Tel-Aviv 69978, Israel
We study structural defects (kinks) which are formed during the transition from a laser cooled cloud of Mg-Ions to a Coulomb crystal [1]. The formation of kink configurations and the transformations of kinks between different structures in dependence on the trapping parameters are investigated. We present configurations of pairs of interacting kinks stable for long times, offering the perspective for exploring and exploiting complex collective nonlinear excitations, controllable on the quantum level [2]. For further investigations we built-up an all solid state laser system to achieve several mW at 280 nm. The system is based on frequency quadrupoling a fibre laser operating at 1118 nm. The first second harmonic generation (SHG) has been realized by a single-pass periodically poled lithium niobate waveguide, which shows at some relevant wavelength an even higher conversion efficiency than LBO ring cavities, whereas the second SHG is based on resonant enhancement in a BBO ring cavity.
[1] M. Mielenz et al., Phys. Rev. Lett. 110, 133004 (2013)
[2] H. Landa et al., New J. Phys. 15, 093003 (2013)