Cavity optomechanics on a microfluidic resonator with water and viscous liquids

Title
Cavity optomechanics on a microfluidic resonator with water and viscous liquids
Authors
이원석김규현Gaurav BahlJing LiuMatthew TomesXudong FanTal Carmon
Issue Date
2013-11
Publisher
Light: Science and Applications
Citation
VOL 2, e110
Abstract
Currently, optical or mechanical resonances are commonly used in microfluidic research. However, optomechanical oscillations by light pressure were not shown with liquids. This is because replacing the surrounding air with water inherently increases the acoustical impedance and hence, the associated acoustical radiation losses. Here, we bridge between microfluidics and optomechanics by fabricating a hollow-bubble resonator with liquid inside and optically exciting vibrations with 100 MHz rates using only mW optical-input power. This constitutes the first time that any microfluidic system is optomechanically actuated. We further prove the feasibility of microfluidic optomechanics on liquids by demonstrating vibrations on organic fluids with viscous dissipation higher than blood viscosity while measuring density changes in the liquid via the vibration frequency shift. Our device will enable using cavity optomechanics for studying non-solid phases of matter, while light is easily coupled from the outer dry side of the capillary and fluid is provided using a standard syringe pump.
URI
http://pubs.kist.re.kr/handle/201004/71099
ISSN
2047-7538
Appears in Collections:
KIST Publication > Article
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