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An All-Optical Trap for a Gram-Scale Mirror

MPS-Authors
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Chen,  Yanbei
Astrophysical Relativity, AEI-Golm, MPI for Gravitational Physics, Max Planck Society;

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Müller-Ebhardt,  Helge
Laser Interferometry & Gravitational Wave Astronomy, AEI-Hannover, MPI for Gravitational Physics, Max Planck Society;

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Rehbein,  Henning
Laser Interferometry & Gravitational Wave Astronomy, AEI-Hannover, MPI for Gravitational Physics, Max Planck Society;

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Fulltext (public)

0612188v2.pdf
(Preprint), 519KB

prl150802.pdf
(Publisher version), 885KB

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Citation

Corbitt, T., Chen, Y., Innerhofer, E., Müller-Ebhardt, H., Ottaway, D., Rehbein, H., et al. (2007). An All-Optical Trap for a Gram-Scale Mirror. Physical Review Letters, 98: 150802. doi:10.1103/PhysRevLett.98.150802.


Cite as: http://hdl.handle.net/11858/00-001M-0000-0013-49A4-4
Abstract
We report on a stable optical trap suitable for a macroscopic mirror, wherein the dynamics of the mirror are fully dominated by radiation pressure. The technique employs two frequency-offset laser fields to simultaneously create a stiff optical restoring force and a viscous optical damping force. We show how these forces may be used to optically trap a free mass without introducing thermal noise, and we demonstrate the technique experimentally with a 1 g mirror. The observed optical spring has an inferred Young's modulus of 1.2 TPa, 20% stiffer than diamond. The trap is intrinsically cold and reaches an effective temperature of 0.8 K, limited by technical noise in our apparatus.