Zigzag antimonene nanoribbons for nanoscaled optical devices

In the present work, the electronic and optical properties of zigzag antimonene nanoribbons are investigated using density functional theory (DFT) calculations. The electronic properties of nanoribbons such as bad gap size and projected density of states are calculated. In the case of optical properties, the real and imaginary parts of the dielectric function and absorption coefficient are obtained for different values of nanoribbons' width. Based on the simulation results of the present work, antimonene nanoribbons are suitable for absorption of the photons with wavelengths between 384 nm to 568 nm.

I. Introduction

According to the latest progress in low-dimensional material synthesis and fabrication, low-dimensional devices attract more attention. In 2004 for the first-time graphene was introduced as the first two-dimensional (2D) material [1] which shows very new and particular properties. It was believed that graphene is the replacement for silicon in the electronics industries but there are some challenges to implementing this goal due to the gapless band structure of graphene. After doping and testing the other methods for the possibility of making a proper bandgap in graphene sheets the first nanoribbons were proposed [1], [2]. Despite of graphene sheet, the nanoribbons have a bandgap dependent on the width of the nanoribbons.