title: All-optical THz wave switching based on CH3NH3PbI3perovskites.
abstract: Hybrid structures of silicon with organic-inorganic perovskites are proposed for optically controllable switching of terahertz (THz) waves over a broad spectral range from 0.2 to 2THz. A 532-nm external laser was utilized to generate photoexcited free carriers at the devices and consequentially to control the terahertz amplitude modulation, obtaining a depth of up to 68% at a laser irradiance of 1.5 W/cm2. In addition, we compared the performances from three types of perovskite devices fabricated via different solution processing methods and suggested a stable and highly efficient THz switch based on a one-step processing. By this we demonstrated the possibility of perovskites as THz wave switching devices in addition to photovoltaics.
authors.affiliation: Department of Physics and Photon Science, Gwangju Institute of Science and Technology (GIST), Gwangju 61005, Republic of Korea.
authors.forename: Kyu-Sup
authors.initials: KS
authors.lastname: Lee
authors.affiliation: Radiation Research Division for Industry and Environment, Korea Atomic Energy Research Institute, Jeongup, Jeollabuk-do 56212, Republic of Korea.
authors.forename: Rira
authors.initials: R
authors.lastname: Kang
authors.affiliation: Department of Physics and Photon Science, Gwangju Institute of Science and Technology (GIST), Gwangju 61005, Republic of Korea.
authors.forename: Byungwoo
authors.initials: B
authors.lastname: Son
authors.affiliation: School of Materials Science and Engineering, Heeger Center for Advanced Materials, GIST, Gwangju 61005, Republic of Korea.
authors.forename: Dong-Yu
authors.initials: DY
authors.lastname: Kim
authors.affiliation: Advanced Photonics Research Institute, GIST, Gwangju 61005, Republic of Korea.
authors.forename: Nan Ei
authors.initials: NE
authors.lastname: Yu
authors.affiliation: Department of Physics and Photon Science, Gwangju Institute of Science and Technology (GIST), Gwangju 61005, Republic of Korea.
authors.forename: Do-Kyeong
authors.initials: DK
authors.lastname: Ko