Data and Time November 18, 2009, 3:00-4:15 PM
Location Sanford Flemming Building (SF), Room B560
Host Alex Wong

Effective Plasmonic Response of Metallic Films with Subwavelength Apertures

Bo Hou

The Edward S. Rogers Sr. Department of Electrical and Computer Engineering (Photonics)


Subwavelength apertures, periodically arranged in the metallic film, will give rise to extraordinarily strong transmission of electromagnetic wave at some specific frequency with magnitude much larger than the area fraction of the apertures in the film.  The underlying mechanisms change from lattice resonance to localized resonance, depending on the waveguiding properties of the aperture. For a particular type of apertures, its shape being exotic fractal pattern (H-tree) and its cutoff resonance being significantly subwavelength, the extraordinary transmission occurs near the cutoff frequency of the fractal apertures.  Furthermore, an effective plasmon frequency can be found there, because the fact that the transmission wavelength is much larger than the periodicity for closely spaced fractal apertures allows the effective medium description of the structured film.


Bo Hou obtained his B.Sc. in physics from Chongqing  University, China in 2001, and his Ph.D in physics from Hong Kong University of Science and Technology, China in 2007.  He joined University of Toronto as post-doctoral fellow in 2008, and works in the micro- and nano-photonics group of Joyce Poon.  His past research interest includes microwave metamaterial/antenna using fractal pattern and enhanced transmissions of classical waves through subwavelength apertures.  Recently he is working toward surface plasmon-based devices.