T
Taiichi Otsuji
Researcher at Tohoku University
Publications - 610
Citations - 11520
Taiichi Otsuji is an academic researcher from Tohoku University. The author has contributed to research in topics: Terahertz radiation & Graphene. The author has an hindex of 52, co-authored 576 publications receiving 10467 citations. Previous affiliations of Taiichi Otsuji include Tokyo Institute of Technology & Harvard University.
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Negative dynamic conductivity of graphene with optical pumping
TL;DR: In this article, the dynamic ac conductivity of a nonequilibrium two-dimensional electron-hole system in optically pumped graphene was studied and it was shown that at sufficiently strong pumping the population inversion in graphene can lead to the negative net ac conductivities in the terahertz range of frequencies.
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Field Effect Transistors for Terahertz Detection: Physics and First Imaging Applications
Wojciech Knap,Michel Dyakonov,D. Coquillat,Frederic Teppe,Nina Dyakonova,Jerzy Łusakowski,Krzysztof Karpierz,Maciej Sakowicz,Gintaras Valušis,Dalius Seliuta,Irmantas Kašalynas,A. El Fatimy,Yahya Moubarak Meziani,Taiichi Otsuji +13 more
TL;DR: In this paper, the main theoretical and experimental results on THz detection by FETs in the context of their possible application for THz imaging are presented, where resonant and gate voltage tunable detection related to plasma waves resonances, is observed.
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Graphene-based devices in terahertz science and technology
Taiichi Otsuji,S. Boubanga Tombet,Akira Satou,Hirokazu Fukidome,Maki Suemitsu,Eiichi Sano,Vyacheslav V. Popov,Maxim Ryzhii,Victor Ryzhii +8 more
TL;DR: Graphene is a one-atom-thick planar sheet of a honeycomb carbon crystal and its gapless and linear energy spectra of electrons and holes lead to nontrivial features such as giant carrier mobility and broadband flat optical response as discussed by the authors.
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Field Effect Transistors for Terahertz Detection: Physics and First Imaging Applications
Wojciech Knap,Mikhail I. Dyakonov,D. Coquillat,Frederic Teppe,N. Dyakonova,Jerzy Łusakowski,Krzysztof Karpierz,Maciej Sakowicz,Gintaras Valušis,Dalius Seliuta,Irmantas Kašalynas,Abdelouahad El Fatimy,Yahya Moubarak Meziani,Taiichi Otsuji +13 more
TL;DR: In this article, the main theoretical and experimental results on THz detection by FETs in the context of their possible application for THz imaging are presented, where resonant and gate voltage tunable detection related to plasma waves resonances is observed.
Journal ArticleDOI
Plasma waves in two-dimensional electron-hole system in gated graphene heterostructures
TL;DR: In this paper, the two-dimensional electron-hole system in a graphene-based heterostructure controlled by a highly conducting gate is studied theoretically, where the energy spectra of two-dimensions electrons and holes are assumed to be conical (neutrinolike) i.e., corresponding to their zero effective masses.