Abstract
The first precise measurement of the Casimir force between dissimilar metals is reported. The attractive force, between a Cu layer evaporated on a microelectromechanical torsional oscillator and an Au layer deposited on an [Formula presented] sphere, was measured dynamically with a noise level of [Formula presented]. Measurements were performed for separations in the [Formula presented] range. The results agree to better than [Formula presented] in the [Formula presented] range with a theoretical model that takes into account the finite conductivity and roughness of the two metals. The observed discrepancies, which are much larger than the experimental precision, can be attributed to a lack of a complete characterization of the optical properties of the specific samples used in the experiment.
Original language | English (US) |
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Journal | Physical review letters |
Volume | 91 |
Issue number | 5 |
DOIs | |
State | Published - Jul 31 2003 |
All Science Journal Classification (ASJC) codes
- Physics and Astronomy(all)