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A: Atomphysik
A 15: Poster 2
A 15.23: Poster
Thursday, March 25, 2004, 14:00–16:00, Schellingstr. 3
Fabrication of Atom Chips and their electrical properties — •Sönke Groth1,2, Peter Krüger1, Stephan Wildermuth1, Diana Mahalu2, Israel Bar-Joseph2, and Jörg Schmeidmayer1 — 1Physikalisches Institut, Heidelberg, Germany — 2Weizmann Institute of Science, Rehovot, Israel
Atom Chips are used to trap neutral atoms and cool them by laser and evaporative cooling even to BEC. The advantages of atom chips are smooth surfaces for non scattered laser reflection, high current densities up to 107 A/cm 2, micro shaped wires for exactly defined potentials, wire thickness from nm to µm scale and serial production.
A high quality preparation process based on nanofabrication lithography capable of structures ∼ 1 µm is shown, which achieves the mentioned criteria. Electrical properties of these atom chips are investigated for measurements of wires with different aspect ratios on several substrates. The heat conductivity of the substrate is of importance for the lifetime of the wire. The technology aspects for miniaturised quantum manipulation atom optics are discussed.