The development of effective techniques for guiding pulsed terahertz radiation is essential for the continued development of terahertz spectroscopy and imaging applications based on the technique of time-domain spectroscopy. Terahertz surface plasmon polaritons (SPPs) can be excited and guided on cylindrical metal wires with low loss and dispersion. This propagating surface wave, known as a Sommerfeld wave, possesses radial polarization, which is not well matched with conventional sources of pulsed terahertz radiation. A photoconductive terahertz antenna with radial symmetry produces radiation that more efficiently couples to the wire waveguide. At the end of the wire, terahertz SPPs emit radiation into free-space that exhibits frequency-dependent diffraction.
Le développement de la spectroscopie THz et des applications en imagerie THz basées sur des techniques temporelles requiert de pouvoir utiliser des guides d'ondes capables de véhiculer les impulsions électromagnétiques THz. Les plasmons-polaritons de surface peuvent être excités le long de fils métalliques cylindriques et guidés avec peu de pertes et une faible dispersion. Cependant, ce type d'onde propagative de surface, appelée onde de Sommerfeld, possède une polarisation radiale contrairement à celle des sources conventionnelles de rayonnement THz qui est généralement linéaire. Pour résoudre ce problème, nous avons conçu une antenne de rayonnement THz qui génère une polarisation de symétrie radiale, permettant d'exciter efficacement les ondes de Sommerfeld. Nous étudions aussi la diffraction en fonction de la fréquence de l'onde de Sommerfeld dans l'espace libre en extrémité du fil métallique.
Mot clés : Térahertz, Guide d'ondes, Plasmons-polaritons de surface, Antenne de rayonnement THz, Simulation par méthode des éléments finis
Jason A. Deibel 1; Kanglin Wang 1; Matthew Escarra 1; Nicholas Berndsen 1; Daniel M. Mittleman 1
@article{CRPHYS_2008__9_2_215_0, author = {Jason A. Deibel and Kanglin Wang and Matthew Escarra and Nicholas Berndsen and Daniel M. Mittleman}, title = {The excitation and emission of terahertz surface plasmon polaritons on metal wire waveguides}, journal = {Comptes Rendus. Physique}, pages = {215--231}, publisher = {Elsevier}, volume = {9}, number = {2}, year = {2008}, doi = {10.1016/j.crhy.2007.07.011}, language = {en}, }
TY - JOUR AU - Jason A. Deibel AU - Kanglin Wang AU - Matthew Escarra AU - Nicholas Berndsen AU - Daniel M. Mittleman TI - The excitation and emission of terahertz surface plasmon polaritons on metal wire waveguides JO - Comptes Rendus. Physique PY - 2008 SP - 215 EP - 231 VL - 9 IS - 2 PB - Elsevier DO - 10.1016/j.crhy.2007.07.011 LA - en ID - CRPHYS_2008__9_2_215_0 ER -
%0 Journal Article %A Jason A. Deibel %A Kanglin Wang %A Matthew Escarra %A Nicholas Berndsen %A Daniel M. Mittleman %T The excitation and emission of terahertz surface plasmon polaritons on metal wire waveguides %J Comptes Rendus. Physique %D 2008 %P 215-231 %V 9 %N 2 %I Elsevier %R 10.1016/j.crhy.2007.07.011 %G en %F CRPHYS_2008__9_2_215_0
Jason A. Deibel; Kanglin Wang; Matthew Escarra; Nicholas Berndsen; Daniel M. Mittleman. The excitation and emission of terahertz surface plasmon polaritons on metal wire waveguides. Comptes Rendus. Physique, Volume 9 (2008) no. 2, pp. 215-231. doi : 10.1016/j.crhy.2007.07.011. https://comptes-rendus.academie-sciences.fr/physique/articles/10.1016/j.crhy.2007.07.011/
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