Department of Physics, Engineering Physics & Astronomy

Department of Physics, Engineering Physics & Astronomy
Department of Physics, Engineering Physics & Astronomy

Challenging the Limits of Diffraction

Reuven Gordon
University of Victoria

Friday, September 30, 2011
1:30 PM @ Stirling A

Abstract:

This talk will show how to overcome three limits of optical diffraction. First, it will be shown how to focus light below the Abbe diffraction limit. Next it will be shown how to squeeze light through subwavelength holes in a metal screen, allowing for 100% transmission, in contrast to Bethe's aperture theory. Finally, it will be shown how to optically trap dielectric nanoparticles (~10 nm) with powers orders of magnitude smaller than required by conventional by Rayleigh scattering trapping formulations, which has interesting applications for manipulating viruses and quantum dots. Both theoretical and recent experimental results will be presented.