ANTENNA AND DETECTOR OF TERAHERTZ
RADIATION BASED ON THE DOUBLE-CARBON-NANOTUBE SYSTEM
Vyacheslav L. Semenenko 1, Vladimir G. Leiman 1, Aleksey
V. Arsenin 1, Yury V. Stebunov 1, Victor I. Ryzhii
2
1
Moscow Institute of Physics and Technology (State University)
2 Tohoku University, Sendai, Japan
Received
June 4, 2012
Abstract. The system of the two same, placed side-by-side and double clamped
single-walled carbon nanotubes with metallic conductivity in the
electromagnetic field of modulated and non-modulated terahertz radiation is
considered. Forced oscillations of the carbon nanotubes electron plasma are
calculated. The lumped parameters of the mechanical resonators that the
nanotubes represent by themselves are determined. It is shown that the
considered system of the nanotubes can serve as a detector of modulated
terahertz radiation. The responsivity of the detector is estimated. The
threshold value of the electric field amplitude of the incoming monochromatic
terahertz radiation, above which the self-excitation of the nanotube mechanical
resonators occurs is estimated.
Keywords: terahertz radiation, sensor, carbon nanotube, contact resistance.