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Multimode optomechanical system in the quantum regime.

ABSTRACT: We realize a simple and robust optomechanical system with a multitude of long-lived (Q >?10⁷) mechanical modes in a phononic-bandgap shielded membrane resonator. An optical mode of a compact Fabry-Perot resonator detects these modes' motion with a measurement rate (96 kHz) that exceeds the mechanical decoherence rates already at moderate cryogenic temperatures (10 K). Reaching this quantum regime entails, inter alia, quantum measurement backaction exceeding thermal forces and thus strong optomechanical quantum correlations. In particular, we observe ponderomotive squeezing of the output light mediated by a multitude of mechanical resonator modes, with quantum noise suppression up to -2.4 dB (-3.6 dB if corrected for detection losses) and bandwidths ?90 kHz. The multimode nature of the membrane and Fabry-Perot resonators will allow multimode entanglement involving electromagnetic, mechanical, and spin degrees of freedom.

SUBMITTER: Nielsen WH

PROVIDER: S-EPMC5224392 | biostudies-literature | 2017 Jan

REPOSITORIES: biostudies-literature

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Multimode optomechanical system in the quantum regime.

Nielsen William Hvidtfelt Padkær WH Tsaturyan Yeghishe Y Møller Christoffer Bo CB Polzik Eugene S ES Schliesser Albert A

Proceedings of the National Academy of Sciences of the United States of America 20161220 1

We realize a simple and robust optomechanical system with a multitude of long-lived (Q > 10<sup>7</sup>) mechanical modes in a phononic-bandgap shielded membrane resonator. An optical mode of a compact Fabry-Perot resonator detects these modes' motion with a measurement rate (96 kHz) that exceeds the mechanical decoherence rates already at moderate cryogenic temperatures (10 K). Reaching this quantum regime entails, inter alia, quantum measurement backaction exceeding thermal forces and thus str ...[more]

PMID: 27999182

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