26/01/2024 at 15:00, Sala Lettura, Building RM009
Metasurfaces and metamaterials emerged as promising nanophotonic material and device platforms to control light-matter interactions at the nanoscale. In such materials, the collective and effective optical response is dictated by individual building blocks and controlled by the geometrical parameters forming the crystal structure. In this talk, I will describe two bottom-up fabrication methods for optical metasurfaces and their applications. First, inverse design and 3D nano printing of compact, polymeric optical metasurfaces will be discussed. As an application area, I will demonstrate polarization splitters and metalenses operating at communication wavelengths. Then, I will introduce DNA-assembly of gold nanoparticles as a fabrication method to realize bottom-up, passive and active nanophotonic hybrid metamaterials and metasurfaces. I will highlight wide range of functional nanophotonic device architectures including epsilon-near-zero metasurfaces, negative index metamaterials and broadband absorber metafilms.
Short Biography
Dr. Koray Aydin is an Associate Professor in the Department of Electrical and Computer Engineering and leading the Metamaterials and Nanophotonic Devices Laboratory. He has received his B.S. and Ph.D. degrees in Physics from the Bilkent University in 2002 and 2008, respectively. He worked as a postdoctoral researcher between 2008-2010 and a research scientist between 2010-2011 at the California Institute of Technology under the supervision of Prof. Harry Atwater. His research interests span several cross-cutting research directions in nanophotonics, including metamaterials and metadevices, plasmonics, inverse-design and machine-learning assisted nanophotonic design, 2D materials, phase-change materials, DNA-assembled and 3D printed nanophotonic materials. Dr. Aydin received the prestigious 2017 ONR Young Investigator Program Award. In 2019, he is selected as The Top Outstanding Young Person (TOYP) in Turkey in the field of scientific and technological development.