Invited Talk: Kuang Zhang, Harbin Institute of Technology

Special session 11: Metamaterials, Metasurfaces, and Their Electromagnetic Applications

Short Bio: 
Prof. Kuang Zhang received the B.S. degree, M.S. degree and Ph.D. degree of Information and Communication Engineering from Harbin Institute of Technology, Harbin, China in 2005, 2007 and 2011, respectively. He is currently an associate professor of Department of Microwave Engineering, Harbin Institute of Technology since Dec. 2014. His current research interests are in the areas of metamaterials & metasurfaces, transform optics, microwave lenses and optical force.
In recent years, he has published more than 30 papers indexed by SCI, which are published in journals Nature Communications, Advanced Materials, Advanced Science, IEEE Transactions on Antennas and Propagation, ACS Applied Materials & Interfaces, Photonics Research, etc. The total citation is more than 1300 times in Google Scholar.

Title: Phase-modulated metasurface for independent manipulation of full circular polarization channels

Abstract:
Geometric-phase metasurfaces are utilized for controlling wavefronts of circular polarized (CP) electromagnetic waves. Combining geometric with propagation phase allows to further control the co-polarized output channel. However, the full CP channels still cannot be completely manipulated. In this report, the concept of chirality-assisted phase as an extra degree of freedom is firstly introduced into the metasurface construction for decoupling the inherent consistence between two co-polarized channels under the light-handed and right-handed CP incidences. Benefiting from the combination of chirality-assisted phase, geometric phase and propagation phase, the all four CP channels can be simultaneously and independently manipulated to generate arbitrary wave-fronts and functionalities. This compound phase addressing mechanism will lead to new components, ranging from broadband achromatic devices to the multiplexing of wavefronts for application in reconfigurable-beam antenna and wireless communication systems.