Browsing Fizik Bölümü Makale Koleksiyonu by Author "eec9db06-8ea8-4237-ba90-ec35736c3446"
Now showing items 21-40 of 42
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Investigation of linear and nonlinear optical absorption coefficients and refractive index changes of a zigzag quantum well with structure parameters and applied external fields
In this study, we have investigated some linear and nonlinear optical properties of GaAs/GaAlAs zigzag quantum well structures under different electric and magnetic field intensities. We also examined the effect of ... -
Investigation of linear and nonlinear optical absorption coefficients and refractive index changes of a zigzag quantum well with structure parameters and applied external fields
In this study, we have investigated some linear and nonlinear optical properties of GaAs/GaAlAs zigzag quantum well structures under different electric and magnetic field intensities. We also examined the effect of ... -
Investigation of the electro-optical characteristics of GaAs/AlGaAs multiple quantum well grown by metal-organic vapor phase epitaxy
Türkoglu, Aslan; Ergün, Y.; Ungan, Fatih (2023)In this study, the photoluminescence measurements of GaAs / Al 0 . 25 Ga 0 . 75 As multi-quantum-wells hetero- junction structure grown on n + - GaAs substrates by Metal Organic Vapor Phase Epitaxy (MOVPE) method are ... -
Linear and nonlinear optical properties of CdSe/ZnTe core/shell nanostructures with screened modified Kratzer potential
Jaouane, M.; El-Bakkari, K.; Al, E. B.; Sali, A.; Ungan, Fatih (2023)In this work, we have theoretically examined the linear, nonlinear and total refractive index changes (RICs) and optical absorption coefficients (OACs) between the ground (1s) and the first excited state (1p) of CdSe/ZnTe ... -
Magneto-optical properties of impurity associated photoionization cross-section in laser-driven delta-doped quantum wires
Ungan, Fatih (27 July 20)Within the structure of parabolic band and effective-mass approximations, the effects of magnetic and intense terahertz laser fields on the donor impurity-associated photoionization cross-section and nonlinear optical properties ... -
Nonlinear optical properties in AlxGa1-xAs/GaAs double-graded quantum wells: The effect of the structure parameter, static electric, and magnetic field
We present a theoretical simulation of the impact of applied external electric and magnetic fields, as well as of the change in structure parameters, on the nonlinear optical rectification (NOR), second harmonic generation ... -
Numerical simulation of linear and nonlinear optical properties in heterostructure based on triple Gaussian quantum wells: effects of applied external fields and structural parameters
Ungan, Fatih (31 August )In this work, we present a theoretical simulation of the impact of applied external fields and structural parameters on the total (linear plus nonlinear) optical absorption coefficient (TOAC) and total refractive relative ... -
Optical properties of a quantum well with Razavy confinement potential: Role of applied external fields
Ungan, Fatih (29 july 20)In this present work, the effect of applied external fields and well width on the optical absorption and refractive index change coefficient of a GaAs quantum well with Razavy confinement potential is theoretically presented. ... -
Optical properties of a triple AlGaAs/GaAs quantum well purported for quantum cascade laser active region
Ungan, Fatih (3 December)A theoretical investigation on the conduction electron states in a triple inverse parabolic AlGaAs/GaAs quantum well, designed in the spirit of the active region for a quantum cascade laser, is performed. The study includes ... -
Photoionization cross section of donor single dopant in multilayer quantum dots under pressure and temperature effects
Jaouane, M.; Sali, A.; Fakkahi, A; Arraoui, R.; Ed-Dahmouny, A.; Ungan, Fatih (2022)The shallow donor single dopant confined in the multilayer cylindrical quantum dots is investigated numerically within the framework of effective-mass approximation. The Schr¨odinger equation that governs the wave ... -
Position-dependent-mass and laser field impact on the optical characteristics of Manning-like double quantum well
Dakhlaoui H; Belhadj, W.; Kasapoglu, E.; Ungan, Fatih (2023)A theoretical investigation of the optical and electronic properties produced by a Manning-type double quantum well under the impact of varied electron effective mass and intense laser field has been implemented within ... -
Strain effect on the intraband absorption coefficient for spherical CdSe/CdS/ZnSe core–shell–shell quantum dots
In this work, we theoretically calculated the intraband absorption coefficient (IAC) between the 1𝑠��� and 1𝑝��� conduction band states for a spherical core/shell/shell quantum dot (CSS-QD) as function of inner and outer ... -
The effect of impurity position and doping concentration on the binding energies and total optical absorption coefficients in a δ-doped quantum well
Ungan, Fatih (Springer, 08 April 2)In this present work, for different impurity position and ionized doping concentrations, we have theoretically investigated the linear, third-order nonlinear, and total optical absorption coefficients corresponding to ... -
The effect of structure parameters and static electric field on the nonlinear optical properties of triple InGaAs/GaAs quantum well
Sayraç, Muhammed; Kaynar, E.; Ungan, Fatih (2023)Optical properties of In x Ga 1-x As/GaAs triple QW are studied for different quantum well thicknesses and external electric fields. The effective mass approximation is used to calculate the band alignment of the structure. ... -
The effects of temperature and pressure on the optical properties of a donor impurity in ðIn; GaÞN=GaN multilayer cylindrical quantum dots
Jaouane, M.; Sali, A.; Fakkahi, A; Arraoui, R.; Ungan, Fatih (2022)This paper examines the variation of the linear, third-order nonlinear and total intersubband optical absorption (refractive index changes) coefficients of a donor impurity in multilayer cylindrical quantum dots (MCQDs), ... -
The non-resonant intense laser field effects on the binding energies and the nonlinear optical properties of a donor impurity in Rosen– Morse quantum well
We analyze the influence of electron–donor impurity interaction as well as of a high-frequency non-resonant intense laser field on the intraband linear, third-order nonlinear, and total optical absorption coefficients in ... -
The nonlinear optical properties of "12-6" tuned GaAs/GaAlAs double quantum well under the external fields
Tüzemen, A. T.; Dakhlaoui H; Al, E. B.; Ungan, Fatih (2023)We have studied the linear and nonlinear optical properties of 12-6GaAs/Ga1-xAlxAs double quantum well heterostructure under different external fields’ effects such as electric, magnetic and intense laser fields. We also ... -
The nonlinear optical properties of GaAs/GaAlAs triple quantum well: Role of the electromagnetic fields and structural parameters
Being relevant to the field of device applications, multiple semiconductor quantum wells are systems that exhibit remarkable optical and electronic properties. These can be properly tuned by suitably modifying the ... -
The nonlinear optical rectification, second and third harmonic generation coefficients of Konwent potential quantum wells
We have theoretically investigated the effect of structure parameters and applied external fields on the Ga1−xAlxAs/GaAs Konwent quantum well structure. Results of theoretical simulation have clarified the impact of applied ... -
Theoretical investigation of linear and nonlinear optical properties in an heterostructure based on triple parabolic barriers: Effects of external fields
Ungan, Fatih (7 January )In this work, we have investigated theoretically the impact of intense laser, electric and magnetic fields on the linear and nonlinear optical properties of a quantum well heterostructure containing triple parabolic ...