Mehdi Hosseini
Department of Physics, Shiraz University of Technology, Shiraz, Iran
[ 1 ] - Controlling the Occurrence of Rogue Waves in an Optically Injected Semiconductor Laser via Changing The Injection Strength
The rouge waves in an optically injected semiconductor lasers are receiving a lot of interest. In this work, the generating and controlling of the rogue waves in semiconductor lasers have been investigated. For this purpose, the laser’s rate equations are solved numerically in a specified time interval, then the field amplitude and the intensity versus time are calculated and analyzed. To solve...
[ 2 ] - Population change in the fine structure levels of cesium atoms using chirped laser
Here, the population transfer between two specific levels of Cesium atomunder the influence of chirped laser source has been numerically investigated. The maingoal of this study is the engineering of the population transfer between the 62S1/2 and 62P1/2levels of Cesium which is corresponding to its D1 transition line using a chirped lasersource. Constructing the system Hamiltonian, as well as t...
[ 3 ] - Noise Equivalent Power Optimization of Graphene- Superconductor Optical Sensors in the Current Bias Mode
In this paper, the noise equivalent power (NEP) of an optical sensor based ongraphene-superconductor junctions in the constant current mode of operation has beencalculated. Furthermore, the necessary investigations to optimize the device noise withrespect to various parameters such as the operating temperature, magnetic field, deviceresistance, voltage and current bias have been presented. By s...
[ 4 ] - امکان جذب تراهرتز توسط چاه پتانسیل کوانتمی دو گانه و پایداری آن
In this paper, the optical properties of the quantum double folded potential well in the terahertz frequency region are investigated. The Schrödinger equation is solved and using the obtained wave functions, the standard density matrix and the iterative method the refractive index and the absorption coefficient in the first order is calculated and investigated. The results show that for the pro...
[ 5 ] - تاثیر اندازه محدود بر روی تابش تراهرتز از یک محیط ابررسانا
The Tera hertz radiation from a finite size superconductor media inside a magnetic field has been investigated. The tera hertz radiation is due to the flux flow motion inside the media. The electromagnetic fields inside the superconductor due to fluxons are calculated and using those fields, the radiation is obtained. In this research, the effects of finite size on the radiated power and signal...
[ 6 ] - The Investigation of Giant Magneto Resistance in an Inhomogeneous Ladder Lattice
Abstract : The variation of the electrical resistivity of a material in the externalmagnetic field is known as magneto resistance. This phenomenon has been attractedboth theoretical and experimental researchers in miniaturization of magneto meters inthe recent years. In this paper, the magneto resistance of an inhomogeneous twodimensional conductor with ladder geometry i...
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