Journal of Infrared, Millimeter, and Terahertz Waves

, Volume 32, Issue 5, pp 629–645

Emission of Terahertz Radiation from Two-Dimensional Electron Systems in Semiconductor Nano- and Hetero-Structures

  • Taiichi Otsuji
  • Takayuki Watanabe
  • Amine El Moutaouakil
  • Hiromi Karasawa
  • Tsuneyoshi Komori
  • Akira Satou
  • Tetsuya Suemitsu
  • Maki Suemitsu
  • Eiichi Sano
  • Wojciech Knap
  • Victor Ryzhii
Article

DOI: 10.1007/s10762-010-9714-0

Cite this article as:
Otsuji, T., Watanabe, T., El Moutaouakil, A. et al. J Infrared Milli Terahz Waves (2011) 32: 629. doi:10.1007/s10762-010-9714-0

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 and InAlAs/InGaAs/InP 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.

Keywords

Terahertz emissionTwo-dimensional electronsPlasmonsGrapheneHeterostructures

Copyright information

© Springer Science+Business Media, LLC 2010

Authors and Affiliations

  • Taiichi Otsuji
    • 1
  • Takayuki Watanabe
    • 1
  • Amine El Moutaouakil
    • 1
  • Hiromi Karasawa
    • 1
  • Tsuneyoshi Komori
    • 1
  • Akira Satou
    • 1
  • Tetsuya Suemitsu
    • 1
  • Maki Suemitsu
    • 1
  • Eiichi Sano
    • 2
  • Wojciech Knap
    • 3
  • Victor Ryzhii
    • 4
  1. 1.Research Inst. of Electrical CommunicationTohoku UniversitySendaiJapan
  2. 2.Research Center for Integrated Quantum ElectronicsHokkaido UniversitySapporoJapan
  3. 3.University of Montpellier & Centre National de la Recherche ScientifiqueMontpellierFrance
  4. 4.Computational Nano-Electronics LaboratoryUniversity of AizuAizu-WakamatsuJapan