[Systèmes électroniques bidimensionnels dans des nano-hétérostructures de semi-conducteurs comme sources de rayonnement térahertz]
Cet article passe en revue des progrès récents dans l'émission de rayonnement térahertz par des systèmes électroniques bidimensionnels (2D) dans des dispositifs à nano-hétérostructures de semi-conducteurs.
L'article débute par une description de la résonance plasmonique 2D qui permet une intense émission térahertz à large bande dans les systèmes InGaP/InGaAs/GaAs. Le dispositif est basé sur un transistor à haute mobilité électronique et inclut des grilles à doubles réseaux interdigités inventées par les auteurs. On s'intéresse ensuite au graphène, monocouche de carbone de maille hexagonale, dont les propriétés de bande interdite et masse effective nulles conduisent à des propriétés optiques et de transport électrique très particulières. On a observé expérimentalement une émission térahertz cohérente par du graphène épitaxié stimulé par un laser infrarouge impulsionnel, ce qui indique une conductivité dynamique négative et une inversion de population dans le matériau.
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.
Mot clés : Émission térahertz, Système électronique bidimensionnel, Plasmons, Graphène, Hétérostructures
@article{CRPHYS_2010__11_7-8_421_0,
author = {Taiichi Otsuji and Hiromi Karasawa and Takayuki Watanabe and Tetsuya Suemitsu and Maki Suemitsu and Eiichi Sano and Wojciech Knap and Victor Ryzhii},
title = {Emission of terahertz radiation from two-dimensional electron systems in semiconductor nano-heterostructures},
journal = {Comptes Rendus. Physique},
pages = {421--432},
publisher = {Elsevier},
volume = {11},
number = {7-8},
year = {2010},
doi = {10.1016/j.crhy.2010.04.002},
language = {en},
}
TY - JOUR AU - Taiichi Otsuji AU - Hiromi Karasawa AU - Takayuki Watanabe AU - Tetsuya Suemitsu AU - Maki Suemitsu AU - Eiichi Sano AU - Wojciech Knap AU - Victor Ryzhii TI - Emission of terahertz radiation from two-dimensional electron systems in semiconductor nano-heterostructures JO - Comptes Rendus. Physique PY - 2010 SP - 421 EP - 432 VL - 11 IS - 7-8 PB - Elsevier DO - 10.1016/j.crhy.2010.04.002 LA - en ID - CRPHYS_2010__11_7-8_421_0 ER -
%0 Journal Article %A Taiichi Otsuji %A Hiromi Karasawa %A Takayuki Watanabe %A Tetsuya Suemitsu %A Maki Suemitsu %A Eiichi Sano %A Wojciech Knap %A Victor Ryzhii %T Emission of terahertz radiation from two-dimensional electron systems in semiconductor nano-heterostructures %J Comptes Rendus. Physique %D 2010 %P 421-432 %V 11 %N 7-8 %I Elsevier %R 10.1016/j.crhy.2010.04.002 %G en %F CRPHYS_2010__11_7-8_421_0
Taiichi Otsuji; Hiromi Karasawa; Takayuki Watanabe; Tetsuya Suemitsu; Maki Suemitsu; Eiichi Sano; Wojciech Knap; Victor Ryzhii. Emission of terahertz radiation from two-dimensional electron systems in semiconductor nano-heterostructures. Comptes Rendus. Physique, Volume 11 (2010) no. 7-8, pp. 421-432. doi : 10.1016/j.crhy.2010.04.002. https://comptes-rendus.academie-sciences.fr/physique/articles/10.1016/j.crhy.2010.04.002/
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