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Departmental Colloquium
Challenging the Limits of Diffraction Reuven Gordon
University of Victoria | Time | |
Fri. September 30, 2011  1:30 PM Stirling A |
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| Abstract | |
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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. |
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