Browsing by Author "Sahin, M."

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Citation - WoS: 11
Citation - Scopus: 12
The Effect of Dilute Nitrogen on Nonlinear Optical Properties of the IngaAsN/GaAs Single Quantum Wells
(Springer, 2012) Koksal, K.; Sahin, M.
In this study, we investigate the linear and third order nonlinear optical properties of InGaAsN/GaAs depending on nitrogen content and laser dressing parameter. As theoretical models, band anticrossing and model solid theory are used. In order to obtain the electronic properties of the quantum well, the finite difference method is used. The laser beam affects the electronic properties of the quantum well by changing the shape of the confinement potential. This modification of the potential is determined by laser dressing parameter. By using dilute amount of nitrogen, conduction band and the depth of quantum well can be controlled. The strain which is introduced due to the presence of nitrogen can be compensated by using indium atoms. The electronic and the linear and third order nonlinear optical properties of InGaAsN/GaAs quantum well structure are obtained.
Citation - WoS: 13
Citation - Scopus: 16
Effects of Surface Curvature and Electric Field on Electronic and Optical Properties of an Off-Center Hydrogenic Donor Impurity in 2D Nanostructures
(Springer Heidelberg, 2024) Chouef, S.; Mommadi, O.; Boussetta, R.; Hbibi, M.; El Moussaouy, A.; Sahin, M.; Duque, C. A.
In this study, we have explored how the curvature of a surface affects the electronic and optical properties of hydrogenic donor impurity within both flat and curved two-dimensional nanostructure, subject to an external electric field. In order to ascertain the energy states and their associated wave functions, we have numerically solved the Schrodinger equation using the effective mass approximation and finite difference method. Utilizing the resulting energy values and wave functions, we have computed binding energy, transition energy, curvature effect, optical absorption coefficient, and oscillator strength of an off-center hydrogenic impurity in a 2D quantum dot nanostructure. Furthermore, we have conducted a thorough analysis of how an electric field and geometrical confinement influence the spectrum of a confined electron-impurity. Our findings reveal that variations in radius and angle of curvature, applied electric field, and impurity position exert profound impacts on the electronic and optical properties of 2D-nanostructures.