University of Tromsø
Fakturamottak
NO-9019 Tromsø
Organisation number
970 422 528
Integrated optics: MicroMove
Research on integrated optics is concentrated on the project MicroMove
 | The aim is to build a lab-on-chip device that integrates active optical functions for manipulation, detection and sorting of micro- and nanoparticles. The Research Council of Norway has given funding for the project till the end of 2010. The funding includes processing, one PhD-position and one post-doc position, with 6 mill. NOK in total, thru the projects "Optical functions and Lab-on-a-Chip for microparticles and biomedicine" from FRINAT and "Nanostructures for optics" from the NANOMAT-program. We have collaboration with several researchers nationally and internationally: |
- Professor James Wilkinson, ORC University of Southampton , UK
- Professor Aasmund Sudbø University of Oslo, Norway
- Dr. Stéphane Getin, CEA LETI, Grenoble, France
- Professor Xuyuan Chen (Vestfold University College, )Norway
- Professor Per Jakobsen, Department of Mathematics and Statistics, University of Tromsø
|
Principle |
 Figure 2. Sequence of images illustrating a chain formation of polystyrene particles propelled on top of a waveguide. Laser light was launched from the right hand side. | However, whereas optical tweezers can manipulate particles in three dimensions, our approach is limited to the two dimensions of the waveguide surface.
Results |
| A simple Y-branched waveguide structure as shown in Figure 1 can be used to sort particles. Changing the position of the input fibre changes the evanescent field distribution and thus sends a chosen particle down the desired output waveguide branch. Clikk Figure 4. to run a movie of a rotating cluster of three 10 µm diameter particles and a 4-particle chain propelled on top of a waveguide. |
Some relevant articles:
K. Grujic, and O.G. Hellesø, "Dielectric microsphere manipulation and chain assembly by counter-propagating waves in a channel waveg-
uide", Optics Express, 15 (2007) 6470-6477.
J.P. Hole, J.S. Wilkinson, K. Grujic, O.G. Hellesø, "Velocity distribution of Gold nanoparticles trapped on an optical waveguide", Optics Express 13 (2005) 3896-3901.
H.Y. Jaising, K. Grujic and O.G. Hellesø, "Simulations and velocity measurements for a microparticle in an evanescent field" Optical Review 12 (1): 4-6 (2005)
H.Y. Jaising and O.G. Hellesø, "Radiation forces on a Mie particle in the evanescent field of an optical waveguide", Optics Comm. 246 (2005): 373-383.
K. Grujic, O.G. Hellesø, J.S. Wilkinson, J.P. Hole, "Sorting of polystyrene microspheres using a Y-branched optical waveguide", Optics Express 13 (2005) 1-7.
K. Grujic, O.G. Hellesø, J.S. Wilkinson and J.P. Hole, "Optical propulsion of microspheres along a channel waveguide produced by Cs+ ion-exchange in glass", Optics Communications, 239, 227-235 (2004)
Contact
If you are interested in more information, collaboration, PhD- or MSc-projects, please contact Olav Gaute Hellesø