Atom Chips: Fabrication and Thermal Properties

Details Atom Chips: Fabrication and Thermal Properties Atom Chips: Fabrication and Thermal Properties

2004-04-06

arxiv.org/abs/cond-mat/0404141v1

Applied Physics Letters, Vol. 85, No. 14, pp. 2980--2982, 2004

Physics

Condensed Matter

Materials Science

Scientific paper

10.1063/1.1804601

Neutral atoms can be trapped and manipulated with surface mounted microscopic current carrying and charged structures. We present a lithographic fabrication process for such atom chips based on evaporated metal films. The size limit of this process is below 1$\mu$m. At room temperature, thin wires can carry more than 10$^7$A/cm$^2$ current density and voltages of more than 500V. Extensive test measurements for different substrates and metal thicknesses (up to 5 $\mu$m) are compared to models for the heating characteristics of the microscopic wires. Among the materials tested, we find that Si is the best suited substrate for atom chips.

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