Mohsen Mehrabi

In this Thesis, the design of a perfect absorber nanostructure in the mid infrared region including phosphorene is discussed. The two-dimensional material black phosphorus that has recently been considered has distinctive properties such as adjustable direct band gap, extremely high charge mobility, high light absorption, large specific surface area and anisotropic structure. The unique properties of this material have made it the subject of study. Also in recent years, the middle infrared region has made rapid progress in photonic and optoelectronic applications using two-dimensional materials. Excitation of surface plasmons enhances the interaction between light and phosphorene, which is used to increase light absorption. The perfect absorption structures of phosphorene-based one-dimensional nanorod photonic crystals are investigated here. Without a reflective layer in the structure, a one-dimensional photonic crystal with coupling of graphene and phosphorene is designed and the absorption spectra and surface plasmons formed are investigated. Then, in order to increase the absorption, the designed structure is optimized. Then, the photonic structure of a one-dimensional phosphorene-based nanorod crystal with a reflective layer is studied and the absorption spectra and surface plasmons formed are investigated. One-dimensional photonic crystal is designed with phosphorene- hBN-phosphorene coating, and the absorption spectra and surface plasmons are investigated. To increase the absorption, the designed structure is optimized. Finite element method (FEM) and COMSOL simulation software were used to perform the simulations.