Prof. Yongmin Liu
Department of Mechanical and Industrial Engineering， Department of Electrical and Computer Engineering，Northeastern University, USA
地点：唐仲英楼 B501
时间：2017-07-31 10:00
In this talk, I will discuss our recent work in dynamic wave manipulation by plasmonics and metamaterials, which would lead to efficient, miniaturized and multifunctional devices. First, I will present a designer metasurface that can efficiently control the polarization of Smith-Purcell emission of moving charged particle by coupling the inherent electric and magnetic dipoles of the metasurface. Second, I will discuss surface plasmons in a parity-time symmetric system, which show striking features of unidirectional excitation and radiative-loss-free propagation. Finally, I will discuss origami-based, dual-band chiral at microwave frequencies. The flexibility in folding the metamaterials provides another degree of freedom for geometry control in the third dimension, which induces strong chirality from the initial, 2D achiral structure. These results open a new avenue towards lightweight reconfigurable meta-devices.
Dr. Yongmin Liu obtained his Ph.D. from the University of California, Berkeley in 2009. He joined the faculty of Northeastern University at Boston in fall 2012 with a joint appointment in the Department of Mechanical & Industrial Engineering and the Department of Electrical & Computer Engineering. Dr. Liu’s research interests include nano optics, nanoscale materials and engineering, plasmonics, metamaterials, biophotonics, and nano optomechanics. He has authored and co-authored about 60 journal papers, including Science, Nature, Nature Nanotechnology, Nature Communications, Physical Review Letters and Nano Letters. Dr. Liu was a recipient of NSF CAREER Award (2017), Office of Naval Research Young Investigator Award (2016), SPIE DCS Rising Researcher Award (2016), 3M Non-Tenured Faculty Award (2016), Air Force Summer Faculty Fellowship (2015), and Chinese Government Award for Outstanding Students Abroad (2009). Currently he serves as an editorial board member for Scientific Reports, EPJ Applied Metamaterials and Nano Convergence.