Argonne National Laboratory

Abstract:
In this talk, I will discuss our recent progress and research activity in the field of metamaterials, nanoantennas and plasmonics, covering a wide range of topics, from theoretical approaches to model the anomalous wave propagation and interaction with metamaterials, to various applications at optical frequencies, including enhanced nonlinearities, sensing, imaging and energy harvesting devices. We will discuss our most recent experimental results in metamaterial research, including the concept of broadband 'plasmonic Brewster funneling', originally introduced theoretically in [A. Alù, et al., Phys. Rev. Lett. 106, 123902 (2011)].

I will also show our near-field and far-field experimental verification of 3-D radio-frequency cloaking, which represents the first experimental realization of a metamaterial cloak in 3-D for a free-standing object. Finally, we will discuss the concept and our recent experimental realization of ultrathin, broadband, planarized circular polarizers based on the concept of twisted metamaterials, realized using lithographically printed optical metasurfaces. Physical insights into these exotic phenomena will be discussed during the talk.