March 29, 2024
Afshin Moradi

Afshin Moradi

Academic rank: Professor
Address: Department of Engineering Physics, Kermanshah University of Technology, Kermanshah, Iran
Education: Ph.D in Physics, Nano-Optics
Phone: 08338305010
Faculty:

Research

Title
Comment on: The single-wall carbon nanotube waveguides and excitation of their σ+π plasmons by an electron beam
Type Article
Keywords
Plasmon, Carbon nanotube
Researchers Afshin Moradi

Abstract

In a recent article [M. Nejati, C. Javaherian, B. Shokri, and B. Jazi, Phys. Plasmas 16, 022108 (2009)], Nejati et al. studied the propagation of plasma wave in the single-wall carbon nanotubes in the presence of the electron beam and showed that the frequency of the σ+π plasma wave strongly depends on the nanotube radius in the short-wavelength region. Here we derive the correct form of the dispersion relation for the transverse magnetic wave in the system and show that the frequency of the plasma wave is quite sensitive to the radius of the tube in the long-wavelength limit.