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Emission of terahertz radiation from two-dimensional electron systems in semiconductor nano-heterostructures

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Title: Emission of terahertz radiation from two-dimensional electron systems in semiconductor nano-heterostructures
Other Titles: Systèmes électroniques bidimensionnels dans des nano-hétérostructures de semi-conducteurs comme sources de rayonnement térahertz
Authors: Otsuji, Taiichi Browse this author
Karasawa, Hiromi Browse this author
Watanabe, Takayuki Browse this author
Suemitsu, Tetsuya Browse this author
Suemitsu, Maki Browse this author
Sano, Eiichi Browse this author →KAKEN DB
Knap, Wojciech Browse this author
Ryzhii, Victor Browse this author
Keywords: Terahertz emission
Two-dimensional electrons
plasmons
graphene
heterostructures
Issue Date: Aug-2010
Publisher: Elsevier Masson SAS
Journal Title: Comptes Rendus Physique
Volume: 11
Issue: 7-8
Start Page: 421
End Page: 432
Publisher DOI: 10.1016/j.crhy.2010.04.002
Abstract: This paper reviews recent advances in emission of terahertz radiation from two-dimensional (2D) electron systems in semiconductor nano-heterostructures. 2D plasmon resonance is first presented to demonstrate intense broadband terahertz emission from InGaP/InGaAs/GaAs material systems. The device structure is based on a high-electron mobility transistor and incorporates the author's original interdigitated dual-grating gates. Second topic focuses on graphene, a monolayer carbon-atomic honeycomb lattice crystal, exhibiting unique carrier transport and optical properties owing to massless and gapless energy spectrum. Coherent stimulated terahertz emission from femtosecond infrared-laser pumped epitaxial graphene is experimentally observed, reflecting the occurrence of negative dynamic conductivity and population inversion.
Type: article (author version)
URI: http://hdl.handle.net/2115/47504
Appears in Collections:量子集積エレクトロニクス研究センター (Research Center for Integrated Quantum Electronics) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 佐野 栄一

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