Halving the Casimir force with conductive oxides

Details Halving the Casimir force with conductive oxides Halving the Casimir force with conductive oxides

2009-01-23

arxiv.org/abs/0901.3720v2

Phys.Rev.Lett.103:040402,2009

Physics

Quantum Physics

modified version, accepted for publication in Phys Rev Lett

Scientific paper

10.1103/PhysRevLett.103.040402

The possibility to modify the strength of the Casimir effect by tailoring the dielectric functions of the interacting surfaces is regarded as a unique opportunity in the development of Micro- and NanoElectroMechanical Systems. In air, however, one expects that, unless noble metals are used, the electrostatic force arising from trapped charges overcomes the Casimir attraction, leaving no room for exploitation of Casimir force engineering at ambient conditions. Here we show that, in the presence of a conductive oxide, the Casimir force can be the dominant interaction even in air, and that the use of conductive oxides allows one to reduce the Casimir force up to a factor of 2 when compared to noble metals.

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