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

Auteur(s): Otsuji Taiichi, Watanabe Takayuki, El Moutaouakil Amine, Karasawa Hiromi, Komori Tsuneyoshi, Satou Akira, Suemitsu Tetsuya, Suemitsu Maki, Sano Eiichi, Knap W., Ryzhii Victor

(Article) Publié: Journal Of Infrared, Millimeter And Terahertz Waves, vol. 32 p.629-645 (2011)
Texte intégral en Openaccess : istex

Ref HAL: hal-00814199_v1
DOI: 10.1007/s10762-010-9714-0
WoS: 000290809100009
Exporter : BibTex | endNote
23 Citations

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