Dr. Hou-Tong Chen, Los Alamos National Laboratory

Hybrid Metasurfaces – Functionalities Arising From Enhanced Light-Matter Interactions

Abstract: Two-dimensional metamaterials – metasurfaces – offer tremendous opportunities in realizing exotic optical phenomena and functionalities. Through tailoring the resonant response of basic building blocks as well as their mutual interactions, they enable effective control of amplitude, phase, and polarization state of optical reflection, transmission, absorption and emission, as well as wavefront shaping and beam forming.  By integrating functional materials such as semiconductors and graphene at critical regions of the resonators, hybrid metasurfaces allow enhanced light-matter interactions and accomplish dynamic switching, active tuning, and enhanced nonlinearity. In this talk I will present the augmented metasurface functionalities through both structural design and materials integration, showing the promising potential of metasurfaces toward real-world applications.

Hou-Tong ChenAbout: Hou-Tong Chen received BS and MS degrees from University of Science and Technology of China in 1997 and 2000, and a Ph.D. degree from Rensselaer Polytechnic Institute in 2004, all in physics. He is currently a Technical Staff Member in the Center for Integrated Nanotechnologies, Los Alamos National Laboratory. His research interests include metamaterials and metasurfaces, terahertz science and technology, ultrafast nanophotonics, and near-field microscopy. He has published over 70 journal papers and delivered nearly 100 invited technical presentations in conferences and accredited research institutions. He is a Topical Editor of Optics Letters (since 2017), and the conference chair of the 8th Optical Terahertz Science and Technology (OTST 2019) to be held at Santa Fe, USA (2019). He won LANL Fellows’ Prize for Outstanding Research (2015), and is a Fellow of American Physical Society (2015).