An all-optical trap for a gram-scale mirror

Details An all-optical trap for a gram-scale mirror An all-optical trap for a gram-scale mirror

2006-12-21

arxiv.org/abs/quant-ph/0612188v2

Physical Review Letters 98, 150802 (2007)

Physics

Quantum Physics

Major revision. Replacement is version that appears in Phy. Rev. Lett. 98, 150802 (2007)

Scientific paper

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 gram 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.

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