Measurement of the Casimir force between a gold sphere and silicon surface with nanoscale trench arrays

Details Measurement of the Casimir force between a gold sphere and silicon surface with nanoscale trench arrays Measurement of the Casimir force between a gold sphere and silicon surface with nanoscale trench arrays

2008-05-24

arxiv.org/abs/0805.3776v1

Phys. Rev. Lett. 101, 030401 (2008)

Physics

Quantum Physics

5 pages, 3 figures

Scientific paper

10.1103/PhysRevLett.101.030401

We report measurements of the Casimir force between a gold sphere and a silicon surface with an array of nanoscale, rectangular corrugations using a micromechanical torsional oscillator. At distance between 150 nm and 500 nm, the measured force shows significant deviations from the pairwise additive formulism, demonstrating the strong dependence of the Casimir force on the shape of the interacting bodies. The observed deviation, however, is smaller than the calculated values for perfectly conducting surfaces, possibly due to the interplay between finite conductivity and geometry effects.

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