Elif Oz Orhan
Gazi University
IrradiationSpin coatingAnalytical chemistryOpticsConductanceDielectricFinite element methodOhmic contactThermionic emissionEquivalent series resistanceComposite materialWaferSchottky barrierVoltageNanostructureMaterials scienceBiasingSchottky diodeMethyl methacrylateGamma ray irradiationCapacitanceGrapheneRaman spectroscopyMultiphysicsOptoelectronicsLaserMetalSiliconChemical vapor depositionAtomic layer depositionElectrical resistivity and conductivityDiodeMechanical engineeringHeterojunctionDielectric lossDepletion region
22Publications
4H-index
52Citations
Publications 26
Newest
#1Esra Efil Kutluoğlu (Gazi University)
#2Elif Oz Orhan (Gazi University)H-Index: 4
Last. Sema Bilge Ocak (Gazi University)H-Index: 5
view all 4 authors...
Abstract null null The purpose of this study is to determine the effects of gamma (γ)-ray irradiation on capacitance and conductance features of Al/Graphene/Al2O3/p-Si structure. Graphene has been grown on copper foil by the Chemical Vapor Deposition (CVD) method and transferred onto Al2O3/p-Si by the conventional transfer method. After Al/Graphene/Al2O3/p-Si structure has been exposed to 30 kGy and 60 kGy γ-ray irradiation, capacitance, and conductance measurements have been accomplished at 300...
Source
Source
#2Mutlu GokkavasH-Index: 18
Last. Ekmel OzbayH-Index: 80
view all 4 authors...
Abstract null null In this study, we analyze the thermo-mechanical behavior of a multi-functional integrated optical chip (MIOC) via the finite element method (FEM). MIOC is a kind of fiber optic component which has a high thermal sensitivity. So; during temperature changes its mechanical resistance has a considerable critical significance. To investigate the thermo-mechanical effects, a three-dimensional device structure is modeled and time-dependent Von-Mises stress analyses are carried out vi...
Source
#1Elif Oz OrhanH-Index: 4
#2Betül AydınH-Index: 7
Last. Theodoros VarzakasH-Index: 21
view all 5 authors...
Source
#1Nuriye Kaymak (Gazi University)H-Index: 5
#2Elif Oz Orhan (Gazi University)H-Index: 4
Last. Sema Bilge Ocak (Gazi University)H-Index: 5
view all 3 authors...
1 CitationsSource
An integrated optical device was modeled in the simulation environment via Comsol software. Model implementation, meshing analysis, the definition of material parameters, analyze and module type was introduced, respectively. At the end of this paper; it was understood that the connection of the bodies with different thermal expansion coefficients causes thermal stress accumulation and deformation. The acquired results reveal that fiber-based components can be analyzed with the contribution of th...
1 Citations
#1Nuriye Kaymak (Gazi University)H-Index: 5
#2Elif Oz Orhan (Gazi University)H-Index: 4
Last. Sema Bilge Ocak (Gazi University)H-Index: 5
view all 4 authors...
Abstract Graphene nanosheets (Gns) obtained by the chemical vapor deposition (CVD) method have been employed for the fabrication of Graphene/Al2O3/p-silicon structure. The Raman, scanning-electron- microscopy (SEM) and transmission-electron-microscopy (TEM) have been used to analyze the morphology and structural features of the graphene nanosheet. The dielectric features and electrical-conductivity of Graphene/Al2O3/p-silicon have been studied in the frequency range 10 kHz to 400 kHz and in the ...
2 CitationsSource
#1Can CandanH-Index: 1
#2Mehmet TikenH-Index: 1
view all 5 authors...
Silicon photomultipliers (SiPM) have drawn considerable attention due to their superior sensitivity with a multi-pixel matrix structure. SiPM can be the choice of a detector for time of flight measurement which is one of the most promising applications in the field of light detection and ranging (LiDAR). In this work, we take advantage of SiPM and attempt to measure longer distances with a low peak power semiconductor laser under outdoor sunny and windy conditions. We achieved a long detection r...
1 CitationsSource
#1Elif Oz Orhan (Gazi University)H-Index: 4
#2E. Efil (Gazi University)H-Index: 4
Last. Sema Bilge OcakH-Index: 5
view all 8 authors...
Abstract The influence of the laser patterning (LP) process on the quality of graphene (Gr) film and Schottky diode characteristics was researched in this study. First of all, p-type silicon (Si) was patterned by homemade femtosecond laser source. To compare the resulting effect, non-patterned n-Si and p-Si were used as substrates. To achieve vertically oriented three-dimensional (3D) Gr nanosheets (VGNs) onto the laser patterned p-type Si, non-patterned n-Si, and p-Si substrates, we used Radio-...
2 CitationsSource
#1E. Efil (Gazi University)H-Index: 4
#2Nuriye Kaymak (Gazi University)H-Index: 5
Last. Adem Tataroğlu (Gazi University)H-Index: 30
view all 7 authors...
Abstract The present study's main purpose is to determine the current-voltage (I–V) performance of Graphene (Gr) based hetero nanostructure produced on Al2O3/p-Si. Graphene synthesis was carried out using the chemical vapor deposition (CVD) technique on Cu foils used as a metal catalyst and transferred onto Al2O3/p-Si using the conventional transfer method. The I–V characteristics of this structure were measured in the dark environment, and the electrical properties of the Gr/Si structure were c...
6 CitationsSource