Nanomeghyas

Nanomeghyas

Investigation of Polarizability of single-walled carbon nanotubes

Document Type : Original Article

Authors
Delaram karimi moghadam 1
afshin moradi 2
1 Department of Physics, Islamic Azad University Malayer Branch, Malayer, Iran
2 bDepartment of Engineering Physics, Kermanshah University of Technology, Kermanshah, Iran
Abstract
A theoretical model for the normalized transversal polarizability of a single-walled carbon nanotube is presented within the framework of the quasi-static approximation. In this way, a single-walled carbon nanotube is modeled by an infinitesimally thin cylindrical shell of the πand σelectrons and electronic excitations of this shell is described by means of the two-dimensional two-fluid quantum hydrodynamic theory. General expression of polarizability of system is obtained, by solving Laplace and quantum hydrodynamic equations with appropriate boundary conditions. By using the polarizability formula, the extinction spectrum of system is investigated which is in fair agreement with the previous results. Therefore, the approach based on the quasi-static approximation may be considered as a simple and robust formalism for the investigation of optical properties of carbon nanotubes.
Keywords
Quasi-static approximation
Polarizability
Single-walled carbon nanotube
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  • Receive Date 22 May 2020
  • Revise Date 23 March 0621
  • Accept Date 13 September 2020