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• W2801166479 abstract "Radiation-pressure-induced optomechanical coupling permits exquisite control of micro- and mesoscopic mechanical oscillators. This ability to manipulate and even damp mechanical motion with light—a process known as dynamical backaction cooling—has become the basis for a range of novel phenomena within the burgeoning field of cavity optomechanics, spanning from dissipation engineering to quantum-state preparation. As this field moves toward more complex systems and dynamics, there has been growing interest in the prospect of cooling traveling-wave phonons in continuous optomechanical waveguides. Here, we demonstrate optomechanical cooling in a continuous system for the first time. By leveraging the dispersive symmetry breaking produced by intermodal Brillouin scattering, we achieve continuous-mode optomechanical cooling in an extended 2.3-cm silicon waveguide, reducing the temperature of a band of traveling-wave phonons by more than 30 K from room temperature. This work reveals that optomechanical cooling is possible in macroscopic linear waveguide systems without an optical cavity or discrete acoustic modes. Moreover, through an intriguing type of wave-vector-resolved phonon spectroscopy, we show that this system permits optomechanical control over continuously accessible groups of phonons and produces a new form of nonreciprocal reservoir engineering. Beyond this study, this work represents a first step toward a range of classical and quantum traveling-wave operations in continuous optomechanical systems.Received 30 May 2018Revised 18 August 2018DOI:https://doi.org/10.1103/PhysRevX.8.041034Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI.Published by the American Physical SocietyPhysics Subject Headings (PhySH)Research AreasBrillouin scattering & spectroscopyIntegrated opticsOptomechanicsPhotonicsAtomic, Molecular & Optical" @default.
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• W2801166479 date "2018-11-27" @default.
• W2801166479 modified "2023-10-02" @default.
• W2801166479 title "Optomechanical Cooling in a Continuous System" @default.
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• W2801166479 doi "https://doi.org/10.1103/physrevx.8.041034" @default.
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