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Phys. Rev. Lett. 97, 170402 (2006) [4 pages]

Demonstration of the Difference in the Casimir Force for Samples with Different Charge-Carrier Densities

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F. Chen1, G. L. Klimchitskaya2, V. M. Mostepanenko3, and U. Mohideen1
1Department of Physics, University of California, Riverside, California 92521, USA
2North-West Technical University, Millionnaya St. 5, St. Petersburg, 191065, Russia
3Noncommercial Partnership “Scientific Instruments”, Tverskaya St. 11, Moscow, 103905, Russia

Received 24 May 2006; published 24 October 2006

A measurement of the Casimir force between a gold coated sphere and two Si plates of different carrier densities is performed using a high vacuum based atomic force microscope. The results are compared with the Lifshitz theory and good agreement is found. Our experiment demonstrates that by changing the carrier density of the semiconductor plate by several orders of magnitude it is possible to modify the Casimir interaction. This result may find applications in nanotechnology.

© 2006 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevLett.97.170402
DOI:
10.1103/PhysRevLett.97.170402
PACS:
12.20.Fv, 12.20.Ds, 68.37.Ps, 73.25.+i