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

Authors

    • Research Inst. of Electrical CommunicationTohoku University
  • Takayuki Watanabe
    • Research Inst. of Electrical CommunicationTohoku University
  • Amine El Moutaouakil
    • Research Inst. of Electrical CommunicationTohoku University
  • Hiromi Karasawa
    • Research Inst. of Electrical CommunicationTohoku University
  • Tsuneyoshi Komori
    • Research Inst. of Electrical CommunicationTohoku University
  • Akira Satou
    • Research Inst. of Electrical CommunicationTohoku University
  • Tetsuya Suemitsu
    • Research Inst. of Electrical CommunicationTohoku University
  • Maki Suemitsu
    • Research Inst. of Electrical CommunicationTohoku University
  • Eiichi Sano
    • Research Center for Integrated Quantum ElectronicsHokkaido University
  • Wojciech Knap
    • University of Montpellier & Centre National de la Recherche Scientifique
  • Victor Ryzhii
    • Computational Nano-Electronics LaboratoryUniversity of Aizu
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