Browsing by Author "Sahin, Mehmet"
Now showing items 21-28 of 28
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The ground state properties of two dimensional Fermi gas system confined in a potential composed of harmonic and a Gaussian terms
Gulveren, Berna; Sahin, Mehmet; Atav, Ulfet (ELSEVIER, RADARWEG 29, 1043 NX AMSTERDAM, NETHERLANDS, 2019)In this work, the ground state properties of two dimensional Fermi gas system interacting in a potential con- sisting of harmonic and Gaussian terms are investigated in the frame of Thomas-Fermi approximation. The depth ... -
The inter-sublevel optical properties of a spherical quantum dot-quantum well with and without a donor impurity
Tas, Hatice; Sahin, Mehmet (AIP Publishing1305 WALT WHITMAN RD, STE 300, MELVILLE, NY 11747-4501, 2012)In this study, we have investigated the inter-sublevel optical properties of a core/shell/well/shell spherical quantum dot with the form of quantum dot-quantum well heterostructure. In order to determine the energy ... -
The intersubband optical properties of a two-electron quantum dot-quantum well heterostructure
Aydin, Rasit; Tas, Hatice; Sahin, Mehmet (ACADEMIC PRESS LTD- ELSEVIER SCIENCE LTD, 2015)In this paper, both linear and third-order nonlinear optical properties of two-electron in a semiconductor core/shell/well/shell quantum dot (QD) heterostructure for cases with and without a hydrogenic donor impurity ... -
Linear and nonlinear optical properties of GaAs/Al(x)Ga1-xAs/GaAs/Al(y)Ga1-yAs multi-shell spherical quantum dot
Kavruk, Ahmet Emre; Sahin, Mehmet; Koc, Fatih (AIP Publishing, 2013)In this work, the optical properties of GaAs/AlxGa1-xAs/GaAs/AlyGa1-yAs multi-shell quantum dot heterostructure have been studied as a function of Al doping concentrations for cases with and without a hydrogenic donor atom. ... -
The linear optical properties of a multi-shell spherical quantum dot of a parabolic confinement for cases with and without a hydrogenic impurity
Sahin, Mehmet; Koksal, Koray (IOP Publishing Ltd, 2012)Throughout this work, we aim to explore the linear optical properties of a semiconductor multi-shell spherical quantum dot with and without a hydrogenic donor impurity. The core and well layers are defined by the parabolic ... -
Optical Properties in a ZnS/CdS/ZnS Core/Shell/Shell Spherical Quantum Dot: Electric and Magnetic Field and Donor Impurity Effects
Sahin, Mehmet; Toscano-Negrette, Rafael G.; Leon-Gonzalez, Jose C.; Vinasco, Juan A.; Morales, A. L.; Koc, Fatih; Kavruk, Ahmet Emre; Mora-Ramos, M. E; Sierra-Ortega, Jose; Martinez-Orozco, J. C.; Restrepo, R. L; Duque, C. A. (MDPI, 2023)A theoretical analysis of optical properties in a ZnS/CdS/ZnS core/shell/shell spherical quantum dot was carried out within the effective mass approximation. The corresponding Schrödinger equation was solved using the ... -
The photoionization cross section of a hydrogenic impurity in a multi-layered spherical quantum dot
Sahin, Mehmet; Tek, Firdes; Erdinc, Ahmet (AIP Publishing1305 WALT WHITMAN RD, STE 300, MELVILLE, NY 11747-4501, 2012)In this study, we have investigated the photoionization cross section of an on-center hydrogenic impurity in a multi-layered spherical quantum dot. The electronic energy levels and their wave functions have been determined ... -
Quantum dot and electron acceptor nano-heterojunction for photo-induced capacitive charge-transfer
Karatum, Onuralp; Eren, Guncem Ozgun; Melikov, Rustamzhon; Onal, Asim; Ow-Yang, Cleva W.; Sahin, Mehmet (NATURE RESEARCHHEIDELBERGER PLATZ 3, BERLIN 14197, GERMANY, 2021)Capacitive charge transfer at the electrode/electrolyte interface is a biocompatible mechanism for the stimulation of neurons. Although quantum dots showed their potential for photostimulation device architectures, dominant ...
