Berlin 2012 – wissenschaftliches Programm
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TT: Fachverband Tiefe Temperaturen
TT 24: Nanomechanics
TT 24.7: Vortrag
Mittwoch, 28. März 2012, 11:15–11:30, H 3005
Cooling in the single-photon regime of optomechanics — •Andreas Nunnenkamp1, Kjetil Borkje2, and Steven Girvin2 — 1Department of Physics, University of Basel, Klingelbergstrasse 82, CH-4056 Basel, Switzerland — 2Departments of Physics and Applied Physics, Yale University, New Haven, Connecticut 06520, USA
Optomechanics experiments are rapidly approaching the regime where the radiation pressure of a single photon displaces the mechanical oscillator by more than its zero-point uncertainty. We show that in this limit the power spectrum has multiple sidebands and that the cavity response has several resonances in the resolved-sideband limit [1]. We then discuss how red-sideband cooling is modified in this nonlinear regime. Using Fermi’s Golden rule we calculate the transition rates induced by the optical drive. In the resolved-sideband limit we find multiple cooling resonances for strong single-photon coupling. They lead to non-thermal steady states and are accompanied by multiple mechanical sidebands in the optical output spectrum. Our study provides the tools to detect and take advantage of this novel regime of optomechanics.
Phys. Rev. Lett. 107, 063602 (2011).