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About RIEC Introduction Message from the Director Principles, Missions, Objectives Institute Vision Organization People, Land and Buildings, Budgets History Chronology International Activities COE of International Research Collaboration How to study at RIEC Organization Computing System Platforms Division Solid State Electronics Dielectric Nano-Devices Materials Functionality Design Spintronics Nano-Integration Devices and Systems Quantum Devices Innovative Spintronic Device Computing Information Theory New Paradigm VLSI System Information Communication Platforms Division Ultrahigh-Speed Optical Communication Group Applied Quantum Optics Group Advanced Wireless Information Technology Information Storage Systems Ultra-Broadband Signal Processing Quantum-Optical Information Technology Network Architecture Environmentally Conscious Secure Information System Human and Bio Information Systems Division Electromagnetic Bioinformation Engineering Advanced Acoustic Information Systems Visual Cognition and Systems Realｰworld computing Nano-Bio Hybrid Molecular Devices Interactive Content Design Soft Computing Integrated System Research Facilities Laboratory for Nanoelectronics and Spintronics Laboratory for Brainware Systems Research Center for 21st Century Information Technology（IT-21 Center） Common Research Facilities Flexible Information System Center Fundamental Technology Center Management Office for Safety and Health Promotion Office Ad-hoc research groups Co-creation Research Center Furukawa Electric x Tohoku Univ. Co-creation Research Center for Photonics Integration Staff Cooperative Research About RIEC Cooperative Research Projects Public Invitation RIEC Nation-wide Application System List of Research Projects Description of acknowledgment RIEC Annual Meeting FY2023 RIEC Annual Meeting FY2022 RIEC Annual Meeting International Exchange International Activities COE of International Research Collaboration Information What’s New Award News Press Release Event RIEC Annual Meeting Projects Type-T (Study Groups on Electrical Communication) Lecture Symposiums Nation-wide Cooperative Study Group Archives RIEC NEWS WEB Latest version of the Archives RIEC, Tohoku University : Back number Annual Report of RIEC : Back Number RIEC NEWS Back Number Other Call For Proposals RIEC Administrative Office (Japanese Website) Educational Activities 日本語 English About RIEC Introduction Message from the Director Principles, Missions, Objectives Institute Vision Organization People, Land and Buildings, Budgets History Chronology International Activities COE of International Research Collaboration How to study at RIEC Organization Computing System Platforms Division Solid State Electronics Dielectric Nano-Devices Materials Functionality Design Spintronics Nano-Integration Devices and Systems Quantum Devices Innovative Spintronic Device Computing Information Theory New Paradigm VLSI System Information Communication Platforms Division Ultrahigh-Speed Optical Communication Group Applied Quantum Optics Group Advanced Wireless Information Technology Information Storage Systems Ultra-Broadband Signal Processing Quantum-Optical Information Technology Network Architecture Environmentally Conscious Secure Information System Human and Bio Information Systems Division Electromagnetic Bioinformation Engineering Advanced Acoustic Information Systems Visual Cognition and Systems Realｰworld computing Nano-Bio Hybrid Molecular Devices Interactive Content Design Soft Computing Integrated System Research Facilities Laboratory for Nanoelectronics and Spintronics Laboratory for Brainware Systems Research Center for 21st Century Information Technology（IT-21 Center） Common Research Facilities Flexible Information System Center Fundamental Technology Center Management Office for Safety and Health Promotion Office Ad-hoc research groups Co-creation Research Center Furukawa Electric x Tohoku Univ. Co-creation Research Center for Photonics Integration Staff Cooperative Research About RIEC Cooperative Research Projects Public Invitation RIEC Nation-wide Application System List of Research Projects Description of acknowledgment RIEC Annual Meeting FY2023 RIEC Annual Meeting FY2022 RIEC Annual Meeting International Exchange International Activities COE of International Research Collaboration Information What’s New Award News Press Release Event RIEC Annual Meeting Projects Type-T (Study Groups on Electrical Communication) Lecture Symposiums Nation-wide Cooperative Study Group Archives RIEC NEWS WEB Latest version of the Archives RIEC, Tohoku University : Back number Annual Report of RIEC : Back Number RIEC NEWS Back Number Other Call For Proposals RIEC Administrative Office (Japanese Website) Educational Activities 日本語 English Ultra-Broadband Signal Processing HOME > Research Activities > Information Communication Platforms Division > Ultra-Broadband Signal Processing &＃62;&＃62; Information Communication Platforms Division Ultra-Broadband Signal Processing Researcher [ Professor ]Taiichi Otsuji [ Associate Professor ]Akira Satou [ Specially Appointed Associate Professor ]Tsung Tse Lin [ Research Fellow ]Chao Tang [ Research Fellow ]Victor Ryzhii Group Web Site https://www.otsuji.riec.tohoku.ac.jp/english/index_en.php Research Activities Terahertz (sub-millimeter) coherent electromagnetic waves are expected to explore the potential application fields of future information and communications technologies. We are developing novel, ultra-broadband integrated signal-processing devices/systems operating in the millimeter and terahertz frequency regime. Ultra-Broadband Devices and Systems (Prof. Otsuji) Research topics Creation of Graphene Terahertz Lasers. Creation of 2D-Atomically-Thin-Layered Hetero-junctions and their Applications to Novel Terahertz Photonic Devices. Physics of Graphene Dirac Plasmons and its Terahertz Functional Applications. Creation of EIC (Energy-Information-Communication) Converged Resilient Network Infrastructure towards Super-Smart Society We are developing novel, integrated electron devices and circuit systems operating in the millimeter-wave and terahertz regions. III-V- and graphene-based active plasmonic heterostructures for creating new types of terahertz lasers and ultrafast transistors are major concerns. By making full use of these world-leading device/circuit technologies, we are exploring future ultra-broadband wireless communication systems as well as spectroscopic/imaging systems for safety and security. Ultra-broadband Device Physics (Assoc. Prof. Satou) Research topics 2D Plasmons in Graphene and Compound-Semiconductor Heterostructures and Their Applications to Terahertz Sources and Detectors. Terahertz Optical Gain in Graphene and Its Application to Terahertz Lasers. Photonics-Electronics Convergence Carrier Converters. We are developing novel, integrated electron devices and circuit systems operating in the millimeter-wave and terahertz regions. III-V- and graphene-based active plasmonic heterostructures for creating new types of terahertz lasers and ultrafast transistors are major concerns. By making full use of these world-leading device/circuit technologies, we are exploring future ultra-broadband wireless communication systems as well as spectroscopic/imaging systems for safety and security. current-injection graphene transistor laser (DFB-DG-GFET). SEM images, measured ambipolar property, simulated modal gain and Q factor, and world-first measured single-mode THz lasing spectra. Dual-grating-gate graphene Dirac plasmon transistor, demonstrating coherent terahertz light amplification with a four-times higher giant gain than the quantum limit Schematic view, SEM image, and measured mixing output of a UTC-PD-top-integrated HEMT photonics-electronics-convergence mixer. Related Videos 研究室のようすThe state of the research About RIEC Message from the Director Principles, Missions, Objectives Institute Vision Organization People, Land and Buildings, Budgets Chronology How to study at RIEC Cooperative Research About RIEC Cooperative Research Projects Public Invitation RIEC Nation-wide Cooperative Research Projects System Description of acknowledgment Information What’s New Archives Link Call For Proposals Link Access Contact Us Sitemap Organization Computing System Platforms Division Information Communication Platforms Division Human and Bio Information Systems Division Research Facilities Common Research Facilities Ad-hoc research groups International Exchange International Activities COE of International Research Collaboration RIEC public relations RIEC Newsweb RIEC Youtube Channel RIEC People 東北大学電気通信研究所Research Institute of Electrical Communication Tohoku University 〒980-8577 宮城県仙台市青葉区片平２丁目１−１2-1-1 Katahira, Aoba-ku, Sendai 980-8577, JAPAN © 2019 Research Institute of Electrical Communication Tohoku University All Rights Reserved.