Plasmon excitation in array of double-walled carbon nanotubes by free-electron beam

Aleksei S. Kadochkin; Igor O. Zolotovskii; Sergey G. Moiseev; Andrei A. Fotiadi

doi:10.1117/12.2621584

24 May 2022 Plasmon excitation in array of double-walled carbon nanotubes by free-electron beam

Aleksei S. Kadochkin, Igor O. Zolotovskii, Sergey G. Moiseev, Andrei A. Fotiadi

Proceedings Volume 12131, Nanophotonics IX; 121310X (2022) https://doi.org/10.1117/12.2621584
Event: SPIE Photonics Europe, 2022, Strasbourg, France

Conference Poster

Abstract

A carbon nanotube (CNT) can be considered as a plasmonic waveguide enabling propagation of ultraslow (with the effective refractive index >100) surface electromagnetic waves in the THz range. In this work, we theoretically study excitation of SPPs in array of double-walled CNTs by electron beam. The most interesting specific features of the double-walled CNT modes are associated with the presence of interlayer modes enabling a strong confinement of the electromagnetic field between the nanowalls of CNT and thus providing a high deceleration coefficient at a relatively low absorption coefficient at the frequencies up to 40–50 THz. Due to the strong SPP confinement between nanowalls the neighboring CNTs have almost no effect on each other. Array of double-walled CNTs ensuring an effective conversion of the external pump energy into the SPP energy can be employed for design of slow-wave plasmonic nanostructures.

Citation Download Citation

Aleksei S. Kadochkin, Igor O. Zolotovskii, Sergey G. Moiseev, and Andrei A. Fotiadi "Plasmon excitation in array of double-walled carbon nanotubes by free-electron beam", Proc. SPIE 12131, Nanophotonics IX, 121310X (24 May 2022); https://doi.org/10.1117/12.2621584

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