Measurement of the Casimir Force between Parallel Metallic Surfaces

We report on the measurement of the Casimir force between conducting surfaces in a parallel configuration. The force is exerted between a silicon cantilever coated with chromium and a similar rigid surface and is detected by looking at the shifts induced in the cantilever frequency when the latter is approached. The scaling of the force with the distance between the surfaces was tested in the $0.5–3.0\mu \mathrm{m}$ range, and the related force coefficient was determined at the $15\%$ precision level.