Microfluidics and Nanofluidics

, Volume 11, Issue 1, pp 93–104

Interaction of guided light in rib polymer waveguides with dielectrophoretically controlled nanoparticles

Authors

    • School of Electrical and Computer EngineeringRMIT University
  • Adam F. Chrimes
    • School of Electrical and Computer EngineeringRMIT University
  • Khashayar Khoshmanesh
    • Centre for Intelligent Systems ResearchDeakin University
  • Vijay Sivan
    • School of Electrical and Computer EngineeringRMIT University
  • Eike Zeller
    • School of Electrical and Computer EngineeringRMIT University
    • School of Electrical and Computer EngineeringRMIT University
  • Arnan Mitchell
    • School of Electrical and Computer EngineeringRMIT University
Research Paper

DOI: 10.1007/s10404-011-0777-6

Cite this article as:
Kayani, A.A., Chrimes, A.F., Khoshmanesh, K. et al. Microfluid Nanofluid (2011) 11: 93. doi:10.1007/s10404-011-0777-6

Abstract

This work demonstrates an optofluidic system, where dielectrophoretically controlled suspended nanoparticles are used to manipulate the properties of an optical waveguide. This optofluidic device is composed of a multimode polymeric rib waveguide and a microfluidic channel as its upper cladding. This channel integrates dielectrophoretic (DEP) microelectrodes and is infiltrated with suspended silica and tungsten trioxide nanoparticles. By applying electrical signals with various intensities and frequencies to the DEP microelectrodes, the nanoparticles can be concentrated close to the waveguide surface significantly altering the optical properties in this region. Depending on the particle refractive indices, concentrations, positions and dimensions, the light remains confined or is scattered into the surrounding media in the microfluidic channel.

Keywords

DielectrophoresisMicrofluidicsNanoparticlesPolymeric waveguideTuneability

Copyright information

© Springer-Verlag 2011