Opto-Mechano-Fluidic Viscometer

Abstract

The recent development of opto-mechano-fluidic resonators has provided -- by harnessing photon radiation pressure -- a new microfluidics platform for the optical sensing of fluid density and bulk modulus. Here we show that fluid viscosity can also be determined through optomechanical measurement of the vibrational noise spectrum of the resonator mechanical modes. A linear relationship between the spectral linewidth and root-viscosity is predicted and experimentally verified in the low viscosity regime. Our result is a step towards multi-frequency measurement of viscoelasticity of arbitrary fluids, without sample contamination, using highly sensitive optomechanics techniques.

4 pages, 4 figures, 1 table

References in corpus (8)

• Analysis of radiation-pressure induced mechanical oscillation of an optical microcavity
• A microchip optomechanical accelerometer
• A hybrid on-chip opto-nanomechanical transducer for ultra-sensitive force measurements
• Observation of Spontaneous Brillouin Cooling
• Brillouin cavity optomechanics with microfluidic devices
• Cavity optomechanics on a microfluidic resonator with water and viscous liquids
• Quasi-droplet Microbubbles for High Resolution Sensing Applications
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Cited by in corpus (9)

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• Hollow Core, Whispering Gallery Resonator Sensors
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• Free-space optomechanical liquid probes using a twin-microbottle resonator
• Phonon coupling between a nanomechanical resonator and a quantum fluid
• Optomechanical non-contact measurement of microparticle compressibility in liquids
• Imaging of acoustic pressure modes in opto-mechano-fluidic resonators with a single particle probe
• Cavity optomechanical mass sensor in water with sub-femtogram resolution