Liu Bie Ju Centre for Mathematical Sciences
City University of Hong Kong
Mathematical Analysis and its Applications
Colloquium

Organized by Prof. Philippe G. Ciarlet and Prof. Roderick Wong

Localized Resonance Approach to
Creating Wave Functional Materials

by
Professor Ping Sheng
Head, Department of Physics
The Hong Kong University of Science and Technology

Date: February 11, 2004 (Wednesday)
Time: 4:30 pm to 6:00 pm*
Venue: Room B6605 (Faculty Conference Room)
Blue Zone, Level 6
Academic Building
City University of Hong Kong

Abstract: I give a review of the localized resonance approach to wave functional materials, with examples in locally resonant sonic materials and planar metallic fractals. Local resonance approach is a fundamentally different approach than the Bragg scattering approach to phononic and photonic crystals. In contrast to the Bragg scattering approach, here the bandgap frequency is decoupled from the lattice constant or feature size of the structure. Hence the overall structure can be subwavelength in size, implying advantages in sonic and microwave applications. Also, the local resonance approach does not require periodicity in the structures, which translates into robustness of the effect and ease in fabrication.

(Tea, coffee and cookies will be provided at the Faculty Common Room in B6501 before the colloquium from 4:00 to 4:30 pm. Please come and join us!)

* Instead of 5:30 p.m.

** All interested are welcome **

For enquiry: 2788-9816

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