세미나 및 강연

Abstract:

Metamaterials and metasurfaces can be used to manipulate, control and tailor the electromagnetic properties in unprecedented ways. They are artificially made structures able to exhibit novel functionalities not available in nature. In different context, Intersubband transitions in n-doped semiconductor heterostructures provide the possibilities to engineer giant electro-optic effect and one of the largest known nonlinear optical responses in condensed matter systems.

I will discuss how we engineer and use these giant electro-optic effect and nonlinear responses to produce polaritonic metasurfaces with ultra-fast electrical tuning and ultra-thin highly-nonlinear metasurfaces for frequency conversion. Structure discussed here represent a novel kind of hybrid metal-semiconductor metamaterials in which exotic optical properties are produced by coupling electromagnetically-engineered plasmonic resonant modes in plasmonic nanostructures with quantum-engineered intersubband transitions in semiconductor heterostructures.

Speaker Bio:

Jongwon Lee received his B.S. degree in Electrical and Computer Engineering from Korea Advanced Institute of Science and Technology (KAIST), Daejeon, Korea, in 2009, M.S. and Ph.D. degree in Electrical and Computer Engineering from University of Texas at Austin (Mikhail Belkin’s group) in 2011 and 2014, respectively. In Fall 2015, Jongwon Lee joined the faculty of UNIST School of Electrical and Computer Engineering as an Assistant Professor. His current research interests include the development of photonic devices based on Surface Plasmon Polaritons, active and nonlinear metamaterials and metasurfaces in mid-infrared and terahertz frequency range.