Casimir spring and dilution in macroscopic cavity optomechanics
| Autor: | Michael E. Tobar, Maxim Goryachev, Jacob Pate, Raymond Y. Chiao, Jay E. Sharping |
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| Rok vydání: | 2020 |
| Předmět: |
Photon
Physics - Instrumentation and Detectors Field (physics) Phonon Physics::Optics General Physics and Astronomy FOS: Physical sciences Applied Physics (physics.app-ph) 01 natural sciences 010305 fluids & plasmas Resonator 0103 physical sciences Mesoscale and Nanoscale Physics (cond-mat.mes-hall) 010306 general physics Optomechanics Physics Quantum Physics Condensed matter physics Condensed Matter - Mesoscale and Nanoscale Physics Physics - Applied Physics Instrumentation and Detectors (physics.ins-det) Dissipation Casimir effect Spring (device) Quantum Physics (quant-ph) Physics - Optics Optics (physics.optics) |
| DOI: | 10.48550/arxiv.2004.05983 |
| Popis: | The Casimir force was predicted in 1948 as a force arising between macroscopic bodies from the zero-point energy. At finite temperatures, it has been shown that a thermal Casimir force exists due to thermal rather than zero-point energy and there are a growing number of experiments that characterize the effect at a range of temperatures and distances. In addition, in the rapidly evolving field of cavity optomechanics, there is an endeavour to manipulate phonons and enhance coherence. We demonstrate a way to realize a Casimir spring and engineer dilution in macroscopic optomechanics, by coupling a metallic SiN membrane to a photonic re-entrant cavity. The attraction of the spatially localized Casimir spring mimics a non-contacting boundary condition, giving rise to increased strain and acoustic coherence through dissipation dilution. This provides a way to manipulate phonons via thermal photons leading to ‘in situ’ reconfigurable mechanical states, to reduce loss mechanisms and to create additional types of acoustic nonlinearity—all at room temperature. An optomechanical cavity comprising a re-entrant cavity and membrane resonators can be tuned in and out of the Casimir regime. At the transition between the two regimes, the mechanical resonators exhibit a change in stiffness—the Casimir spring. |
| Databáze: | OpenAIRE |
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