The Casimir force on a surface with shallow nanoscale corrugations: Geometry and finite conductivity effects

Details The Casimir force on a surface with shallow nanoscale corrugations: Geometry and finite conductivity effects The Casimir force on a surface with shallow nanoscale corrugations: Geometry and finite conductivity effects

2010-09-17

arxiv.org/abs/1009.3487v1

Phys.Rev.Lett.105:250402,2010

Physics

Quantum Physics

Scientific paper

10.1103/PhysRevLett.105.250402

We measure the Casimir force between a gold sphere and a silicon plate with nanoscale, rectangular corrugations with depth comparable to the separation between the surfaces. In the proximity force approximation (PFA), both the top and bottom surfaces of the corrugations contribute to the force, leading to a distance dependence that is distinct from a flat surface. The measured Casimir force is found to deviate from the PFA by up to 15%, in good agreement with calculations based on scattering theory that includes both geometry effects and the optical properties of the material.

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