title: Photoinduced Nonlinear Mixing of Terahertz Dipole Resonances in Graphene Metadevices.
abstract: The first experimental demonstration of nonlinear terahertz difference-frequency generation in a hybrid graphene metadevice is reported. Decades of research have revealed that terahertz-wave generation is impossible in single-layer graphene. This limitation is overcome and nonlinear terahertz generation by ultra-short optical pulse injection is demonstrated. This device is an essential step toward atomically thin, nonlinear terahertz optoelectronic components.
authors.affiliation: School of Electrical and Electronic Engineering, Yonsei University, Seoul, 120-749, South Korea.|Center for Quantum-Beam-based Radiation Research, Korea Atomic Energy Research Institute, Daejeon, 305-353, South Korea.
authors.forename: Chihun
authors.initials: C
authors.lastname: In
authors.affiliation: Department of Mechanical Engineering, Korea Advanced Institute of Science and Technology (KAIST), Daejeon, 305-751, South Korea.
authors.forename: Hyeon-Don
authors.initials: HD
authors.lastname: Kim
authors.affiliation: Department of Mechanical Engineering, Korea Advanced Institute of Science and Technology (KAIST), Daejeon, 305-751, South Korea.
authors.forename: Bumki
authors.initials: B
authors.lastname: Min
authors.affiliation: School of Electrical and Electronic Engineering, Yonsei University, Seoul, 120-749, South Korea.
authors.forename: Hyunyong
authors.initials: H
authors.lastname: Choi
keywords: graphene; nonlinear optics; spectroscopy; terahertz; ultrafast optics