Hossein Shirkani

Persian Gulf University | PGU · Department of physics

Optical absorbers have many applications in the field of optoelectronics, photovoltaics, and energy harvesting because of their capability to absorb electromagnetic waves, as well as their ability to adjust the absorption of specific wavelengths in the mid-IR region. In this study, a perfect optical absorber was designed, which included a gold refl...

Because of anisotropic properties of phosphorene, in this paper, the effect of curvature on phosphorene is investigated by designing phosphorene nanotubes in the IR range. It was observed that creating curvature in the phosphorene monolayer would increase the absorption rate. By designing a SPR biosensor based on phosphorene nanotubes, the sensitiv...

Two-dimensional materials because of their unique physical and chemical properties made changes in the last two decades. Phosphorene, as a member of the 2D materials family, is a semiconductor material with a bandgap 0.2eV that leads to many applications in field-effect transistors, cathode/anode materials in batteries, energy storage, optical gas...

Two structures of graphene-silver asymmetric grating surface plasmon resonance sensors with high sensitivity were presented. In Structure 1, the air, with a thickness of 100 nm, was located on the sensing medium; while, Structure 2 has become small with ignoring the air. The sensitivity of both sensors was calculated through the alteration of the w...

The emergent need for high-sensitivity and low-cost sensors to detect biomolecules and diseases in the shortest time is one of the important targets in medical and industrial progress. In this paper, multiple-step sensors based on SPR in graphene were proposed and investigated. The structures consisted of graphene-gold gratings that were separated...

Nowadays, graphene is one of the most used materials in the manufacturing of optical instruments, such as sensors, photovoltaic cells, and especially absorbers. The unrivaled ability of graphene in the formation of high-quality surface plasmons creates extraordinary features for absorber devices. Here, by exploiting the nanoplasmonic structure cons...

Due to the increase in blood diseases such as diabetes, detecting the concentration of some biomolecules relating to these diseases, such as glucose, is very important; therefore, designing high quality, cheap, and easy-to-build biosensors is one of the most important targets of researchers. For this reason, a graphene-gold ellipse grating SPR bios...

Due to the emergent need of identifying biomolecules at very low densities to diagnose illnesses, as well as detect dangerous gases for health, early on, designing a high-quality sensor with simple structure is one of the most important targets for the researchers. Because of this issue, a graphene-gold grating surface plasmon resonance (SPR) senso...

In this paper, by using trapezius gold grating that covered by a graphene monolayer a surface Plasmon's were formed in the near infrared region. By using the wavelength dependence of the Plasmon's resonance on the optical properties of sensitive layer (deionization water), a biosensor in near infrared were suggested. By introducing the sensitivity...

Nowadays, graphene has many applications in optical instruments, biosensors, gas sensors, photovoltaic cells, and so on. In this study, we aimed at investigating the optical properties of graphene under the influence of plasmons created in one-dimensional photonic crystal structure by making use of the absorption spectrum. We put the gold photonic...

Because of the extensive exponential using of graphene in optoelectronic devices, it is necessary to control its optical properties. One of the effective ways of creating strong electromagnetic fields in a small area of space is graphene surface Plasmon’s. In this paper, by using Graphene-Gold Nano Photonic Crystal, surface Plasmon’s were created i...

Surface Plasmon's in graphene have been used extensively due to their extraordinary specifications. In this paper, surface Plasmon's were formed in the near infrared region using steps gold grating covered by a graphene monolayer and a sensitive layer structure. also the optical properties of the graphene and the extinction of the structure was stu...

Surface Plasmon's in graphene have been used extensively due to their high specificity. In this paper, we constructed surface Plasmon's in visible and near infrared regions by using a photonics crystal of gold nanoribbons in the vicinity of graphene and studied the optical properties of the graphene and the 1-R of the structure. We process, the wav...

The present report is concerned with the dynamical behavior of (Formula presented.)-electronic valley states, under the interaction with transverse zone-boundary optical phonons, in graphene. It is assumed that the phonons are thermal and obey the Bose–Einstein distribution, while the (Formula presented.)-electrons are initially prepared in an expe...

Temporal behavior of entanglement between electrons in silicene and single mode radiations is reported. We show that the corresponding total Hamiltonian and time evolution operators are block diagonal. Initial states are divided into two categories for which buckling and the intrinsic spin-orbit effects are either of opposite or the same signs. Neg...

It is well known that future information technology relies upon electronic states other than charge, through the feasibility of constructing spintronic and valleytronic devices. The main challenge in such applications is the generation and control of the corresponding state currents. The present paper is thus concerned with charge, spin and valley...

In this article we present the time evolution of the electronic spin and subbands states, of an electron in an anisotropic two dimensional Rashba quantum dot, to which a magnetic field of arbitrary strength is applied. We also explicitly include the confining (gate) effects as a two dimensional anisotropic harmonic oscillator. From the governing Ha...