Hannover 2016 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 12: Ultra-cold atoms, ions and BEC (with A)
Q 12.43: Poster
Montag, 29. Februar 2016, 16:30–19:00, Empore Lichthof
Investigating and Minimizing Surface Effects in Cold Atom magnetic Field Microscopy — •Xiaoke Li1, Amruta Gadge1, Tim James1, Bo Lu2, Christopher Mellor1, Nephtali Garrido-Gonzalez1, Christian Koller3, Fedja Orucevic1, and Peter Krüger1 — 1School of Physics and Astronomy, University of Nottingham, Nottingham NG7 2RD, UK — 2Department of Physics, The Chinese University of Hong Kong, Shatin, N.T., Hong Kong — 3Mirco and Nano systems FH,Wiener Neustadt, Austria
Using cold atom as magnetic field sensor is one of the promising directions towards quantum technology. The advantage is that it can measure the magnetic field (and electric field) with both high spatial resolution and good field sensitivity, compared with magnetic force microscopy and SQUIDs. The limitation of achieved resolution is met while minimizing the distance between atoms and surface, which leads to loss of atoms due to Casimir force and Johnson noise. To reduce the surface effects and achieve submicron trapping, we investigate different surfaces such as silicon nitride membranes. The positioning of atoms over different samples is carried out by an on-chip magnetic transport system, which is generated by a 10-layer printed circuit board containing wires with 10µm to 20mm widths. Before loading the 87Rb atoms into the magnetic trap, we use a novel dual color magneto-optical trap to improve the atom number. We will present the results of simulation and current progress of experiment.