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Past Events
Rectifying Reflection from Magnetic Photonic Crystals: Magnetic Plasmonics
| Speaker: | Professor S.T. Chui |
| Affiliation: | Department of Physics, University of Delaware, USA |
| Date: | September 4, 2009 (Fri) |
| Time: | 4:00-5:00 p.m. |
| Venue: | Room 522, 5/F, Chong Yuet Ming Physics Building, HKU |
Abstract:
When an oscillating line source is placed in front of an array of flat uniformly spaced ferrite rods, half of the image disappeared at some frequency. This comes from the coupling to photonic states of the "magnetic surface plasmon" band. These states exhibit giant circulations that only go in one direction due to time reversal symmetry breaking. Possible applications of this "rectifying" reflection include a robust one-way waveguide, a 90 degree beam bender and a beam splitter, which are shown to work even in the deep subwavelength scale. In these systems, a "superflow" behaviour is observed: the energy flow does not decrease in the presence of different defects.
Coffee and tea will be served 20 minutes prior to the seminar.