[Loclphys] Colloquium Announcement (Dr. John Weiner) 2/16/2010

[Malin, Delicia M.]

Old Dominion University
Department of Physics

Spring Colloquium Series

Tuesday February 16, 2010

"Extraordinary optical transmission revisited: how light gets through isolated or periodic arrays of subwavelength slits and holes (or not)"

Dr. John Weiner
National Institute of Standards and Technology, Center for Nanoscale Science and Technology



The passage of light through apertures much smaller than the wavelength of the light has proved to be a surprisingly subtle phenomenon. This talk describes how modern developments in nanofabrication, coherent light sources, three-dimensional numerical vector field simulations and careful, quantitative measurements have led to the radical revision of early predictions based on scalar diffraction theory and classical electrodynamic models. Optical response of real materials to incident coherent radiation at petahertz frequencies leads to unexpected consequences for transmission (and extinction) of light through subwavelength aperture arrays.  Applications of subwavelength light localization ("plasmonics") to long-standing problems of single-molecule detection, ultrasensitive detection of refractive index changes, and solar energy conversion will also be discussed to the extent that time and interest allows.





Presentation: Physical Sciences Building II 1100 @ 3:00 pm
Refreshments: 1st Floor Atrium @ 2:30 pm

More details at http://www.physics.odu.edu
All are Welcome!

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