Stable, mode-matched, medium-finesse optical cavity incorporating a microcantilever mirror

Harris, J. G. E.; Zwickl, B. M.; Jayich, A. M.

Stable, mode-matched, medium-finesse optical cavity incorporating a microcantilever mirror

Authors

Harris, J. G. E.

Zwickl, B. M.

Jayich, A. M.

Description

A stable optical resonator has been built using a 30 micrometer-wide, metal-coated microcantilever as one mirror. The second mirror was a 12.7 mm-diameter concave dielectric mirror. By positioning the two mirrors 75 mm apart in a near-hemispherical configuration, a Fabry-Perot cavity with a finesse equal to 55 was achieved. The finesse was limited by the optical loss in the cantilever's metal coating; diffraction losses from the small mirror were negligible. The cavity achieved passive laser cooling of the cantilever's Brownian motion.
11 pages, 4 figures