Influence of random roughness on the Casimir force at small separations

P. J. van Zwol, G. Palasantzas*, J. Th. M. De Hosson

*Bijbehorende auteur voor dit werk

OnderzoeksoutputAcademicpeer review

91 Citaten (Scopus)
291 Downloads (Pure)


The influence of random surface roughness of Au films on the Casimir force is explored with atomic force microscopy in the plate-sphere geometry. The experimental results are compared to theoretical predictions for separations ranging between 20 and 200 nm. The optical response and roughness of the Au films were measured and used as input in theoretical predictions. It is found that at separations below 100 nm, the roughness effect is manifested through a strong deviation from the normal scaling of the force with separation distance. Moreover, deviations from theoretical predictions based on perturbation theory can be larger than 100%.

Originele taal-2English
Aantal pagina's5
TijdschriftPhysical Review. B: Condensed Matter and Materials Physics
Nummer van het tijdschrift7
StatusPublished - feb-2008

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