One dimensional tight binding computations for CNT type, diameters and chirality at (1550, 1300)‎ nm communication window wavelength

الملخص EN

In this paper, the electronic density of state (DOS) of a carbon nanotube has been calculated using Tight Binding (TB) method.

The result based on the graphene sheet model, is deduced as a function of the nanotube chirality and diameter.

These two latter properties in turn decide wither the CNT is metallic or semiconducting.

The diameters for zigzag and armchair type of CNT were calculated according to energy gaps of (0.773), (0.922) eV the equivalent of 1550nm and 1300nm wavelength.

The DOS of these energy gaps was simulated with the first energy level (E11) using MATLAB.