[Excitation et propriétés de propagation des plasmons de surface à la surface de réseaux de diffraction métalliques dans le domaine térahertz]
Dans le domaine spectral des ondes électromagnétiques térahertz, les plasmons de surface se propagent sur de très longues distances. Cette propriété permet d'imaginer des systèmes térahertz quasi-optiques bi-dimensionnels à la surface d'une plaque métallique. L'excitation de plasmons de surface à l'aide d'ondes incidentes planes peut être réalisée de façon efficace par un réseau de diffraction gravé sur le métal. Dans cet article, nous présentons un ensemble de travaux récents que nous avons effectués pour caractériser ce type d'excitation. L'analyse des données expérimentales obtenues par spectroscopie térahertz dans le domaine temporel nous a permis de mettre en exergue les principaux paramètres opto-géométriques qui entrent en jeu dans le couplage et dans la propagation des plasmons à la surface des réseaux et d'échantillons lisses.
Because of their long propagation length at a metal surface in the far infrared, surface plasmons make potentially feasible the design and realization of 2D integrated terahertz systems over a metallic substrate. The coupling of a terahertz beam to the surface plasmon wave is very efficiently achieved by diffraction gratings engraved at the metal surface. In this article, we present a review of some recent works we performed in view of characterizing this coupling phenomenon. The analysis of the experimental data supplied by terahertz time-domain spectroscopy allows us to point out the main parameters that govern this diffraction process and the propagation of a surface plasmon over a flat or corrugated metal surface.
Mot clés : Térahertz, Plasmons de surface
@article{CRPHYS_2008__9_2_232_0,
author = {Maxim Nazarov and Fr\'ed\'eric Garet and Damien Armand and Alexander Shkurinov and Jean-Louis Coutaz},
title = {Surface plasmon {THz} waves on gratings},
journal = {Comptes Rendus. Physique},
pages = {232--247},
publisher = {Elsevier},
volume = {9},
number = {2},
year = {2008},
doi = {10.1016/j.crhy.2008.01.004},
language = {en},
}
TY - JOUR AU - Maxim Nazarov AU - Frédéric Garet AU - Damien Armand AU - Alexander Shkurinov AU - Jean-Louis Coutaz TI - Surface plasmon THz waves on gratings JO - Comptes Rendus. Physique PY - 2008 SP - 232 EP - 247 VL - 9 IS - 2 PB - Elsevier DO - 10.1016/j.crhy.2008.01.004 LA - en ID - CRPHYS_2008__9_2_232_0 ER -
Maxim Nazarov; Frédéric Garet; Damien Armand; Alexander Shkurinov; Jean-Louis Coutaz. Surface plasmon THz waves on gratings. Comptes Rendus. Physique, Volume 9 (2008) no. 2, pp. 232-247. doi : 10.1016/j.crhy.2008.01.004. https://comptes-rendus.academie-sciences.fr/physique/articles/10.1016/j.crhy.2008.01.004/
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