Near-field cavity optomechanics with nanomechanical oscillators
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Cavity-enhanced radiation-pressure coupling between optical and mechanical degrees of freedom allows quantum-limited position measurements and gives rise to dynamical backaction, enabling amplification and cooling of mechanical motion. Here, we demonstrate purely dispersive coupling of high-Q nanomechanical oscillators to an ultrahigh-finesse optical microresonator via its evanescent field, extending cavity optomechanics to nanomechanical oscillators. Dynamical backaction mediated by the optical dipole force is observed, leading to laser-like coherent nanomechanical oscillations solely due to radiation pressure. Moreover, sub-fm Hz−1/2 displacement sensitivity is achieved, with a measurement imprecision equal to the standard quantum limit (SQL), which coincides with the nanomechanical oscillator’s zero-point fluctuations. The achievement of an imprecision at the SQL and radiation-pressure dynamical backaction for nanomechanical oscillators may have implications not only for detecting quantum phenomena in mechanical systems, but also for a variety of other precision experiments. Owing to the flexibility of the near-field coupling platform, it can be readily extended to a diverse set of nanomechanical oscillators. In addition, the approach provides a route to experiments where radiation-pressure quantum backaction dominates at room temperature, enabling ponderomotive squeezing or quantum non-demolition measurements.
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ANETSBERGER, Georg, Olivier ARCIZET, Quirin P. UNTERREITHMEIER, Rémi RIVIÈRE, Albert SCHLIESSER, Eva M. WEIG, Jörg P. KOTTHAUS, Tobias J. KIPPENBERG, 2009. Near-field cavity optomechanics with nanomechanical oscillators. In: Nature Physics. 2009, 5(12), pp. 909-914. ISSN 1745-2473. eISSN 1745-2481. Available under: doi: 10.1038/nphys1425BibTex
@article{Anetsberger2009Nearf-23481, year={2009}, doi={10.1038/nphys1425}, title={Near-field cavity optomechanics with nanomechanical oscillators}, number={12}, volume={5}, issn={1745-2473}, journal={Nature Physics}, pages={909--914}, author={Anetsberger, Georg and Arcizet, Olivier and Unterreithmeier, Quirin P. and Rivière, Rémi and Schliesser, Albert and Weig, Eva M. and Kotthaus, Jörg P. and Kippenberg, Tobias J.} }
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