Encyclopedia of Nanotechnology

Living Edition
| Editors: Bharat Bhushan

Microfluidic Optomechanics

  • Gaurav Bahl
Living reference work entry
DOI: https://doi.org/10.1007/978-94-007-6178-0_100963-1



Microfluidic optomechanical resonators (opto-mechano-fluidic resonators or OMFRs) enable coupling between light, solids, and fluids by means of optical forces and opto-acoustic scattering. This is achieved through solid–fluid hybrid modes that span vibrational frequencies in the MHz–GHz range. Using these interactions, microfluidic optomechanical devices can be used to perform acoustic rheological measurements on fluids using only light.

Principle of Operation

OMFRs are hollow silica microcapillary devices of diameter typically around 50–300 um, with diameter modulation along their length. These regions of larger diameter simultaneously host ultrahigh-Q optical resonant modes and high-Q acoustic resonant modes in the solid shell (see Fig. 1). Fluids infused into the hollow core of OMFRs do not directly interact with light in the shell (see optofluidics), provided the shell is made sufficiently thick. As a result, high optical Q can...


Stimulate Brillouin Scattering Hybrid Mode Solid Shell Hollow Silica Pressure Actuation 
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Copyright information

© Springer Science+Business Media Dordrecht 2015

Authors and Affiliations

  1. 1.Mechanical Science and EngineeringUniversity of Illinois at Urbana-ChampaignUrbanaUSA