Browsing Fizik Bölümü by Issue Date
Now showing items 1-20 of 195
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Effects of the confinement potential parameters and optical intensity on the linear and nonlinear optical properties of spherical quantum dots
(Elsevier, 01.01.2023)We study the linear and nonlinear optical properties of a spherical GaAs quantum dot with screened modified Kratzer potential (SMKP) by solving the time-independent Schrödinger wave equation using the diagonalization method. ... -
Full optical SESAM characterization methods in the 1.9 to 3-µm wavelength regime
(01/03/2021)Semiconductor saturable absorber mirrors (SESAMs) are widely used for modelocking of various ultrafast lasers. The growing interest for SESAM-modelocked lasers in the short-wave infrared and mid-infrared regime requires ... -
Nonlinear optical specifications of the Mathieu quantum dot with screw dislocation
(04.08.2023)In this study, the nonlinear optical properties of screw dislocation InxGa1−xAs/GaAs Mathieu quantum dots (MQDs) are theoretically investigated for the first time, focusing on the optical rectification (NOR), second harmonic ... -
Combined effects of thermodynamic factors and external fields for nonlinear optical processes of deformed Mathieu quantum dot containing central impurity
(05.08.2023)The theoretical impact of external parameters such as the hydrostatic pressure, temperature, electric field, magnetic field, as well as the Indium (In) concentration and quantum dot width on the nonlinear optical properties ... -
Probe of axion-like particles in vector boson scattering at a muon collider
(05.09.2023)We have examined the sensitivity of the axion-like particles (ALP) couplings to electroweak gauge bosons in the diphoton production at a future muon collider. The collisions at the μ+μ− energies of 3 TeV, 14 TeV, and 100 ... -
MANYETİK ALANIN KÜRESEL BİR ÇEKİRDEK/KABUK/KABUK YARI İLETKEN KUANTUM NOKTASINDAKİ TEK DONORUN DOĞRUSAL VE DOĞRUSAL OLMAYAN KIRILMA İNDİSİ DEĞİŞİKLİKLERİ ÜZERİNE ETKİSİ
(05.11.2021)Bu çalışmada, yarıiletken GaAs (çekirdek)/Al_0.1 Ga_0.9 As (iç kabuk)/Al_0.4 Ga_0.6 As (dış kabuk) çekirdek/kabuk/kabuk kuantum nokta heteroyapısında kuşatılmış tek bir sığ hidrojenik donor katkı maddesine ilişkin doğrusal, ... -
Linear and nonlinear optical properties of semi-elliptical InAs quantum dots: Effects of wetting layer thickness and electric field
(Elsevier, 06.06.2022)In this paper, we have studied the optical properties of semi-elliptical InAs quantum dots (QDs) embedded in GaAs. Under effective mass approximation, the finite element method has been used to obtain wavefunctions and ... -
Search for invisible dark photon in scattering at future lepton colliders
(Springer, 06.07.2022)For the first time, the production of a massive dark photon (DP) in the γe− scattering at the future lepton colliders ILC, CLIC, and CEPC is examined. The invisible decay mode of the DP is addressed. We have studied both ... -
Energy transitions and half-life determinations of Sc isotopes from photonuclear reaction on Ti target
(World Scientific Publishing Company, 07/03/2022)For the activation of the target nucleus, bremsstrahlung photons generated in a medical linear accelerator can be used. Due to particle separation energy limitations for low photon energies in the giant resonance region ... -
The effect of impurity position and doping concentration on the binding energies and total optical absorption coefficients in a δ-doped quantum well
(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 ... -
Watt-level and sub-100-fs self-starting mode-locked 2.4-µm Cr:ZnS oscillator enabled by GaSb-SESAMs
(09/02/2021)Femtosecond lasers with high peak power at wavelengths above 2 µm are of high interest for generating mid-infrared (mid-IR) broadband coherent light for spectroscopic applications. Cr2+-doped ZnS/ZnSe solid-state lasers ... -
Artificial-intelligence-supported shell-model calculations for light Sn isotopes
(American Physical Society, 11/04/2022)The region around the doubly magic nuclide 100 Sn is very interesting for nuclear physics studies in terms of structure, reaction, and nuclear astrophysics. The main ingredients in nuclear structure studies using the ... -
The anisotropy effects on the shallow-donor impurity states and optical transitions in quantum dots
(12 August )In this work, we theoretically investigate the anisotropy effects on impurity states and optical transitions in quantum dots. In particular, we investigate the role of the impurity position on the binding energy and ... -
Influence of position dependent effective mass on impurity binding energy and absorption in quantum wells with the Konwent potential
(Elsevier, 13 July 20)In this work, we perform a theoretical investigation on the effect of position-dependent effective mass on binding energy and optical absorption coefficient for donor impurities in single and double quantum wells defined ... -
Parabolic–Gaussian Double Quantum Wells Under a Nonresonant Intense Laser Field
(MDPI, 14 Nisan 2)In this paper, we investigate the electronic and optical properties of an electron in both symmetric and asymmetric double quantum wells that consist of a harmonic potential with an internal Gaussian barrier under a ... -
Linear and nonlinear optical properties of a superlattice with periodically increased well width under electric and magnetic fields
(Elsevier, 14.04.2022)In this paper, we have studied the electronic and optical properties of GaAs/AlxGa1-xAs superlattice with periodically increased well width. Under effective mass approximation, the finite element method is used to obtain ... -
Control of electronic and optical properties of a laser dressed double quantum dot molecule by lateral electric field
(15 August )We study the confined states of a molecule formed by two laterally coupled quantum dots. The static electric field and incident plane wave laser field are considered with different polarization. The respective Shr¨odinger ... -
Tuning of nonlinear optical characteristics of Mathieu quantum dot by laser and electric field
(SPRINGER HEIDELBERG, 15 Ekim 20)In this work, for the first time, the total refractive index (TRICs) and total absorption coefficients (TACs) of InxGa1−xAs/GaAs Mathieu quantum dot (MQD) with hydrogenic impurity under the influence of the external ... -
Vcsel Tabanlı Yüksek Güçlü Yarıiletken Lazerler
(15.01.2021)Proje Özeti VCSEL’ler (vertical-cavity surface-emitting laser, düşey- kovuklu yüzey-ışımalı lazer) yirmi yılı aşkın bir süredir giderek büyüyen veri iletişimi (datacom) alanının anahtar parçalarından birisidir. Bunun ... -
Yüksek Güç-Frekans Uygulamaları İçin MOCVD ile Epitaksiyel AlN Kristalinin Büyütülmesi, Katkılanması, Karakterizasyonu ve Aygıt Üretimi
(15.03.2021)Yüksek Güç-Frekans Uygulamaları İçin MOCVD ile Epitaksiyel AlN Kristalinin Büyütülmesi, Katkılanması, Karakterizasyonu ve Aygıt Üretimi