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CEMSE Seminar | Controlling wave propagation in complex media: Breaking the limits

Start Date: February 28, 2017
End Date: February 28, 2017

By Professor Ying Wu (KAUST)
 
As one of the most fundamental concepts in science and engineering, wave-medium interaction has undoubtedly innovated numerous technologies that deeply changed our world. The developments of wave-based technologies, however, are hindered by various limitations in wave-medium interaction, such as size limit, frequency limit and material limit. Thus, profound understanding and effective modeling of wave propagation in complex media beyond the existing limits are highly desired. In this talk, I will introduce my contributions in modeling classical wave propagation in complex systems by emphasizing on the following aspects: homogenization, numerical methods, artificial materials, and linear dispersion relations. I will start with a brief review of my work on homogenization schemes that can go beyond the quasi-static limit, followed by a numerical example of a large-scale system. Then, I will show how our theories can guide the explorations of new artificial materials that break the material parameter limit. Finally, I will reveal the link between a zero-index material and linear dispersion relations in periodic structures beyond the long-wavelength limit, and introduce a general perturbation theory to characterize the linear dispersions. The so-called Dirac-like cones and double-Dirac cones as well as their links to the classical analogues of topological insulators will be discussed.
 
Biography : Dr. Ying Wu has been an assistant professor in the Division of Computer, Electrical and Mathematical Sciences and Engineering (CEMSE) at King Abdullah University of Science and Technology (KAUST) since 2011. She received her BSc in physics from Nanjing University in 2002 and PhD in physics from the Hong Kong University of Science and Technology (HKUST) in 2008. Prior to KAUST, she worked as a post-doctoral fellow at HKUST. Her research interests are centered on classical wave propagation in complex media, including homogenization, wave functional materials, wave transport in random media, and numerical methods. Dr. Wu is a member of APS, ASME, SIAM and SPIE. She has published over 30 articles in peer-reviewed journals, including Nature Materials, Physical Review Letters, Physical Reviews, and Applied Physics Letters. She is an active reviewer of many leading journals and has recently been recognized as an EPL Distinguished Referee of 2016 by European Physical Society. She also served as a session organizer/program chair in PIERS (Progress In Electromagnetics Research Symposium) and AES (Advanced Electromagnetics Symposium).
 

More Information:

For more info contact: Prof. Ying Wu: email: ying.wu@kaust.edu.sa
 
Date: Tuesday 28th Feb 2017
Time:02:00 PM - 03:00 PM
Location: Location: Building 9, Hall I Room 2322
Refreshments: Refreshments will be available at 13:45 PM