Hannover 2016 – wissenschaftliches Programm

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Q: Fachverband Quantenoptik und Photonik

Q 2: Ultracold Atoms, Ions and Molecules I (with A)

Q 2.4: Vortrag

Montag, 29. Februar 2016, 11:45–12:00, e001

Feedback-based position stabilisation of microparticles — •Saravanan Sengottuvel, Michael Johanning, and Christoph Wunderlich — University of Siegen, Germany

We report on the status of an experiment utilizing feedback for the three-dimensional position stabilization of a charged micro particle. Laser light scattered by the particle illuminates position sensitive detectors and generates an error signal upon displacement of the particle. This error signal is then used to generate a compensating field using correction electrodes. For a particle that is initially trapped in a linear segmented Paul trap, this allows to ramp down and finally switch off the trap and end up with a well localized quasi-free particle. We discuss the approach, potential applications and limitations for sensitivity, position confinement and particle size.