An All-Optical Trap for a Gram-Scale Mirror
T. R. CorbittLIGO Laboratory, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USAYanbei ChenMax-Planck-Institut für Gravitationsphysik, Am Mühlenberg 1, 14476 Potsdam, GermanyE. InnerhoferLIGO Laboratory, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USAH. Müller‐EbhardtLaser Interferometry & Gravitational Wave Astronomy, AEI-Hannover, MPI for Gravitational Physics, Max Planck SocietyD. J. OttawayLIGO Laboratory, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USAH. RehbeinLaser Interferometry & Gravitational Wave Astronomy, AEI-Hannover, MPI for Gravitational Physics, Max Planck SocietyD. SiggStanley WhitcombLIGO Laboratory, California Institute of Technology, Pasadena, California 91125, USAChristopher WipfLIGO Laboratory, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USAN. MavalvalaLIGO Laboratory, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
2007en
ABI
Annotatsiya
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.
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