Brillouin cavity optomechanics with microfluidic devices

Gaurav Bahl (), Kyu Hyun Kim, Wonsuk Lee, Jing Liu, Xudong Fan and Tal Carmon
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Gaurav Bahl: Mechanical Science and Engineering, University of Illinois at Urbana-Champaign
Kyu Hyun Kim: Electrical Engineering and Computer Science, University of Michigan
Wonsuk Lee: Electrical Engineering and Computer Science, University of Michigan
Jing Liu: Biomedical Engineering, University of Michigan
Xudong Fan: Biomedical Engineering, University of Michigan
Tal Carmon: Electrical Engineering and Computer Science, University of Michigan

Nature Communications, 2013, vol. 4, issue 1, 1-6

Abstract: Abstract Cavity optomechanics allows the parametric coupling of phonon- and photon-modes in microresonators and is presently investigated in a broad variety of solid-state systems. Optomechanics with superfluids has been proposed as a path towards ultra-low optical- and mechanical-dissipation. However, there have been no optomechanics experiments reported with non-solid phases of matter. Direct liquid immersion of optomechanics experiments is challenging, as the acoustic energy simply leaks out to the higher-impedance liquid surrounding the device. Here we confine liquids within hollow resonators to circumvent this issue and to enable optical excitation of mechanical whispering-gallery modes at frequencies ranging from 2 to 11,000 MHz. Our device enables optomechanical investigation with liquids, while light is conventionally coupled from the outer dry side of the capillary, and liquids are provided by means of a standard microfluidic inlet.

Date: 2013
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DOI: 10.1038/ncomms2994

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