Metasurfaces: From Nanoantennas Inclusions to Patterned 2D Sheets
In this talk, we will start with the idea of optical nanoantennas and how they can be realized with plasmonic and dielectric elements. Then the idea of metasurfaces constructed from nanoantennas will be described. Nanoantennas can control amplitude, phase, and polarization of a wave, acting as the alphabet for wave engineering, pixel by pixel on a surface. Applications in various disciplines including transmit and reflect array, flat lenses, beam shaping and optical phased array will be described. We will then extend the concept to meta-sheets, graded patterned 2D sheets by organic molecules or voltage bias, and how the light can be manipulated on an atom-thick platform. Novel phenomena and their theory computational modeling will be discussed.
More about the Speaker: Hossein Mosallaei is Associate Professor and Director of Metamaterials Laboratory at Northeastern University. He received his PhD form University of California at Los Angeles (UCLA), and was on the faculty of University of Michigan as a Research Scientist before joining Northeastern. He has extensive experience in the field of metasurfaces nanoantennas with a focus on theory and computation. He has been involved in several funding opportunities from NSF and DoD (AFOSR, ONR, ARO, DARPA). He has authored and co-authored over 170 technical journal articles and conference papers. Dr. Mosallaei is the recipient of 2001 URSI Young Scientist award, 2002 Raj Mittra Travel Grant award, and four times IEEE AP-S prize for the best student paper in 2000, 2001, 2003 and 2005 (with his student). His student won the NU Thesis Fellowship Award in 2010. He has been the College of Engineering nomination for Northeastern University's Excellence in Research and Creativity Award in 2011.