Electromagnetic Characteristics of Carbon Nanotube Based Antennas
Journal Title: Bulletin of Pure and Applied Sciences Sec. D – Physics - Year 2018, Vol 37, Issue 1
Abstract
We have studied electromagnetic characteristics of carbon nanotube based antennas in different frequency regimes ranging from the microwave to visible. Analysis of the physical characteristics of carbon nanotube based integrated circuit elements, such as antennas, must follow the general principles of electrodynamics and must account for the peculiar dispersion properties of electrons in carbon nanotubes. A key element of the analysis is the formulation of the effective boundary conditions for electromagnetic field on the carbon nanotube surface. We have incorporated the presence of intershell tunneling in the effective boundary conditions, showing thereby that tunneling alters the effective boundary conditions significantly from the effective boundary conditions presented previously. In order to incorporate intershell tunneling in the effective boundary conditions, we have adopted a microscopic approach. We observed that intershell tunneling qualitatively changed the form of effective boundary conditions in a doublewall carbon nanotube in comparison to single wall carbon nanotubes. The surface current densities and the axial component of the electric field on the surfaces of different shells get coupled, which effect leaded to a generalized susceptibility that contained the mutual surface conductivities of both shells. The mutual surface condivities are caused by the tunneling. The existence of mutual condivities leaded to the appearance of electrostatic longitudinal waves in the spectra of a double wall carbon nanotube. Different types of guided waves in the double wall carbon nanotube arise from intershell tunneling. The dispersion characteristics of asymmetric like waves are strongly affected in the wide frequency range by intershell tunneling
Authors and Affiliations
Anil Kumar Lal Das
Patterns in Two Photon Photoemission Images of Light Diffracting Structures in Wave Guiding Transparent Thin Films
We have studied the patterns in two photon photoemission images of light diffracting structures in wave guiding transparent thin films. We first determined the wave numbers of guided modes that can be expected in dielect...
Power Dependence of the Amplitude of the Microwave Radiation Induced Magneto-Resistance Oscillations and Linear Polarisation
We have studied the power dependence of the amplitude of the microwave radiation induced magneto resistance oscillations and the linear polarization sensitivity of these oscillations. For the power dependence, some exper...
Rotating MHD Flow: An Exact Solution by Hodograph Transformation
The motion of a homogenous, rotating, incompressible, second grade fluid with finite electrical conductivity through porous media in the presence of transverse magnetic field has been considered. For steady plane transve...
Relativistic Study of the Recoil Energy of Photon due to Nuclear and Atomic Transition in Mossbauer Effect
In this paper, we have discussed the non-relativistic and relativistic treatment of the recoil energy of photon due to the nuclear transition and atomic transition and calculated the total energy of the recoil event for...
Comparative Study of Ion/Ioff Ratio of Silicon Nanowire Transistor (SNWT) with Planner MOSFET
In this paper, a general approach, that considers both electrostatic integrity and quantum confinement, so called the “EQ approach”, to compare the device performance of nanoscale Si FETs with various gate geometry confi...