MSE Seminar Series: Stephanie Law
Friday, September 30, 2016
Room 2108, Chemical and Nuclear Engineering Building
Clare Boothe Luce Assistant Professor
Materials Science and Engineering
University of Delaware
Plasmonic Excitations in Unusual Materials: Doped Semiconductors and Topological Insulators
The fields of plasmonics and metamaterials have seen significant growth in recent years, due to the interest in confining light to subwavelength volumes both for fundamental physics studies as well as novel device architectures. Much of this work has been done in the visible spectral range with traditional metals such as gold and silver. In this talk, I will discuss my recent work using new materials, specifically heavily-doped InAs grown by molecular beam epitaxy, for mid-infrared plasmonic and metamaterial devices. I will explain the advantages of these new materials over traditional plasmonic materials in the infrared and demonstrate that they act as near-perfect Drude metals with tunable optical properties which can also be integrated with existing semiconductor optoelectronic devices. I will then show new results on semiconductor infrared metamaterials, which exhibit negative refraction. I will close by discussing some recent work using other materials, including topological insulators grown by molecular beam epitaxy for the far-infrared.
More about the speaker:
Dr. Law is the Clare Boothe Luce Assistant Professor in Materials Science and Engineering at the University of Delaware. She received her B.S. in Physics from Iowa State University and her Ph.D. in Physics from the University of Illinois Urbana Champaign, where she studied interactions between superconductors and semiconductors. She then held a postdoctoral position in the Electrical Engineering department at Illinois where she demonstrated the feasibility of using doped semiconductors as tunable, low-loss infrared plasmonic materials. Her research investigates the use of novel materials and architectures for plasmonic and metamaterial devices in the infrared and THz.