Analytical study of the electronic and optical properties of the armchair MoS2 nanoribbons

In this paper, a tight binding approach is employed to compute the electronic properties of the armchair MoS2 nanoribbon. Among the three distinct groups of pristine armchair nanoribbons, the family with index N = 3p+2, (p being an integer), renders the highest band gap energy. Furthermore, having the Hamiltonian matrix and using the imaginary part of the dielectric function, the optical properties of the armchair nanoribbons are calculated for different widths. The transitions between subbands of the armchair MoS2 nanoribbons lead to peaks in the dielectric function. Simulation results illustrate how ribbon's width, may be tuned to design nanoribbon's band gap for a specific optoelectronic or digital electronic application.