Systèmes électroniques bidimensionnels dans des nano-hétérostructures de semi-conducteurs comme sources de rayonnement térahertz

Translated title of the contribution: Emission of terahertz radiation from two-dimensional electron systems in semiconductor nano-heterostructures

Taiichi Otsuji, Hiromi Karasawa, Takayuki Watanabe, Tetsuya Suemitsu, Maki Suemitsu, Eiichi Sano, Wojciech Knap, Victor Ryzhii

Research output: Contribution to journalShort survey

8 Citations (Scopus)

Abstract

This article 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. The second topic focuses on graphene, a monolayer carbon-atomic honeycomb lattice crystal, exhibiting unique carrier transport and optical properties owing to the 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.

Translated title of the contributionEmission of terahertz radiation from two-dimensional electron systems in semiconductor nano-heterostructures
Original languageFrench
Pages (from-to)421-432
Number of pages12
JournalComptes Rendus Physique
Volume11
Issue number7-8
DOIs
Publication statusPublished - 2010 Aug 1

Keywords

  • Graphene
  • Heterostructures
  • Plasmons
  • Terahertz emission
  • Two-dimensional electrons

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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