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 Al2O3 sphere, was measured dynamically with a noise level of 6 fN/rootHz. Measurements were performed for separations in the 0.2-2 mum range. The results agree to better than 1% in the 0.2-0.5 mum 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.
Published in:
Physical Review Letters 91,5 (2003) 050402;
Link to original published article:
http://dx.doi.org/10.1103/PhysRevLett.91.050402
Keywords
mu-m range;; dimensions;; solids
Date of Version
January 2003
Recommended Citation
Decca, R. S.; Lopez, D.; Fischbach, E.; and Krause, D. E., "Measurement of the Casimir force between dissimilar metals" (2003). Department of Physics and Astronomy Faculty Publications. Paper 582.
https://docs.lib.purdue.edu/physics_articles/582