Strong dispersive coupling of a high-finesse cavity to a micromechanical membrane

J. D. Thompson, B. M. Zwickl, A. M. Jayich, Florian Marquardt, S. M. Girvin and J. G. E. Harris ()
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J. D. Thompson: Yale University, 217 Prospect Street, New Haven, Connecticut, 06520, USA
B. M. Zwickl: Yale University, 217 Prospect Street, New Haven, Connecticut, 06520, USA
A. M. Jayich: Yale University, 217 Prospect Street, New Haven, Connecticut, 06520, USA
Florian Marquardt: Center for NanoScience, and Arnold Sommerfeld Center for Theoretical Physics, Ludwig Maximilians University, Theresienstrasse 37, 80333, Munich, Germany
S. M. Girvin: Yale University, 217 Prospect Street, New Haven, Connecticut, 06520, USA
J. G. E. Harris: Yale University, 217 Prospect Street, New Haven, Connecticut, 06520, USA

Nature, 2008, vol. 452, issue 7183, 72-75

Abstract: Cool quantum science In recent years micromechanical devices have been developed that can strongly couple to light, by integrating them within optical cavities. A main goal has been to cool the devices optomechanically, freezing out all thermal vibrations, so that the object's motion eventually becomes limited by quantum mechanical fluctuations. This would make it possible to study a new range of quantum behaviour of mechanical objects. Thompson et al. report an improved design of such a system, involving a movable membrane sandwiched between two rigid high-quality mirrors. In previous designs one of the mirrors had to double-up as a microresonator. The new device achieves substantial cooling, from room temperature to 6.8 mK. It should eventually be possible to reach the quantum-limited ground state with this system.

Date: 2008
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DOI: 10.1038/nature06715

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