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The role of defects on the transition from saturable absorption to nonlinear absorption of Bi12GeO20 single crystal under increasing laser excitation PEPE, YASEMİN; Isik, Mehmet; KARATAY, AHMET; YILDIZ, ELİF; Hasanlı, Nızamı; ELMALI, AYHAN (2022-11-01) © 2022 Elsevier B.V.This work reports defect and input intensity dependent nonlinear optical behaviors of Bi12GeO20 (BGO) single crystal. Open aperture (OA) Z-scan experiments were performed with 532 nm excitation waveleng...
Temperature-dependent thermoelastic properties of GaSb and InSb semiconductors: Identification through ab initio DFT simulations Baloğlu, Eyüp Can; Toffoli, Hande; Dal, Hüsnü (2022-10-15) © 2022 Elsevier B.V.III–V semiconductors are extensively used in infrared sensor applications due to their superior structural and optical properties. Due to the extremes in the manufacturing and operating temperatures of ...
Structural, morphological and temperature-tuned bandgap characteristics of CuS nano-flake thin films Isik, Mehmet; Terlemezoglu, Makbule; Hasanlı, Nızamı; Parlak, Mehmet (2022-10-01) © 2022 Elsevier B.V.Copper sulfide (CuS) thin films were produced by radio-frequency (RF) magnetron sputtering method. Structural, morphological and optical characteristics of deposited CuS films were presented. X-ray diff...
Linear and nonlinear optical characteristics of Bi12SiO20 single crystals Isik, M.; Hasanlı, Nızamı (2022-09-01) © 2022 Elsevier B.V.Bi12SiO20 single crystals grown by Czochralski method were optically investigated in detail in the present paper. Transmission and reflection measurements were performed at room temperature in the 400–8...
Spectroscopic ellipsometry characterization of PbWO4 single crystals Delice, S.; Isik, M.; Hasanlı, Nızamı; Darvishov, N.H.; Bagiev, V.E. (2022-09-01) © 2022 Elsevier B.V.Optical characterization of PbWO4 single crystals grown by Czochralski method was achieved in virtue of spectroscopic ellipsometry experiments carried out in the energy region of 1.0–5.6 eV at room temp...
LIPSS for SERS: Metal Coated Direct Laser Written Periodic Nanostructures for Surface Enhanced Raman Spectroscopy Erkizan, Serena Nur; İdikut, Fırat; Demirtas, Ozge; Goodarzi, Arian; Demir, Ahmet Kemal; Borra, Mona; Pavlov, Ihor; Bek, Alpan (2022-09-01) A novel method of fabricating large-area, low-cost surface-enhanced Raman spectroscopy (SERS) substrates is introduced which yields densely nanostructured surfaces utilizing laser-induced periodic surface structuring (LIPS...
Temperature-tuned optical bandgap of Al-doped ZnO spin coated nanostructured thin films Isik, M.; Hasanlı, Nızamı (2022-08-15) © 2022 Elsevier B.V.Al-doped ZnO (AZO) nanostructured thin films were produced by spin coating of AZO ink. The structural characteristics were determined by x-ray diffraction (XRD) and scanning electron microscopy (SEM) te...
Structural, mechanical and electrical properties of sputter-coated copper thin films on polyethylene terephthalate Abdeltwab, E.; Atta, A.; Bek, Alpan (2022-08-10) © 2022 World Scientific Publishing Company.In this study, ion-beam-sputtering technique is used to prepare nanocomposite films, consisting of deposited copper nanoparticles (CuNPs) on polyethyleneterephthalate (PET). The s...
A method to predict temperature derivatives of the bulk modulus: A case study for HfB2 Özkan, Hüsnü; Delice, Serdar; Hasanlı, Nızamı (2022-08-01) © 2022 IOP Publishing Ltd.Hafnium diboride (HfB2) is an ultra-high temperature ceramic that has attracted increased attention for its fascinating properties. In this study, temperature derivatives of the bulk modulus of Hf...
Investigation of the complex magnetic behavior of Ni46.86Co2.91Mn38.17Sn12.06(at%) magnetic shape memory alloy at low temperatures Ylldlrlm, Oǧuz; Yuce, Suheyla; Bruno, Nickolaus M; Doǧan, Emel Kilit; Yurtseven, Hasan Hamit; DUMAN, EYÜP; EMRE, ŞİNASİ BARIŞ (2022-08-01) © 2022 IOP Publishing Ltd.The magnetic properties, martensitic transformation characteristics, the magnetic field-induced transformation characteristics, and super spin-glass behaviour at low temperature of Ni46.86Co2.91Mn...
Calculation of the T – X phase diagram of tetradecane + hexadecane and tetradecane + pentadecane under high pressure by the landau mean field theory Tari, O.; Yurtseven, Hasan Hamit (2022-08-01) © 2022 Elsevier B.V.Landau phenomenological model is applied to two binary mixtures (tetradecane + hexadecane and tetradecane + pentadecane) to calculate T−x (temperature - composition) phase diagram under high pressure fo...
Quantum games and interactive tools for quantum technologies outreach and education Seskir, Zeki Can; et. al. (2022-08-01) We provide an extensive overview of a wide range of quantum games and interactive tools that have been employed by the quantum community in recent years. We present selected tools as described by their developers, includin...
Impact of oxygen partial pressure during Indium Tin Oxide sputtering on the performance of silicon heterojunction solar cells Donercark, Ergi; Guler, Secil; Hande Ciftpinar, Emine; Kabacelik, Ismail; Koc, Mehmet; Cigdem Ercelebi, Ayse; Turan, Raşit (2022-07-01) © 2022 Elsevier B.V.TCO has multiple functions in SHJ solar cell design, including the lateral transport of the photogenerated current and also providing high transparency and anti-reflective behavior. While superior perfo...
Study of the structural and optical properties of thallium gallium disulfide (TlGaS2) thin films grown via thermal evaporation Isik, M.; KARATAY, AHMET; Ech-Chergui, A.N.; Hasanlı, Nızamı (2022-07-01) © 2022 IOP Publishing Ltd.Thallium gallium disulfide (TlGaS2) belonging to layered structured semiconducting family has been a significant compound due to its outstanding characteristics. Its layered characteristics take a...
Investigation of optical characteristics of PbMoO4 single crystals by spectroscopic ellipsometry Delice, S.; Isik, M.; Hasanlı, Nızamı; Darvishov, N.H.; Bagiev, V.E. (2022-07-01) © 2022 Elsevier GmbHIn this study, we investigated the optical properties of PbMoO4 single crystals grown by Czochralski method. Spectroscopic ellipsometry measurements were carried out in the energy region between 1.0 and...
Tensionless strings and Killing(-Yano) tensors Lindström, Ulf; Sarıoğlu, Bahtiyar Özgür (2022-06-10) © 2022 The Author(s)We construct invariants for bosonic and spinning tensionless (null) strings in backgrounds that carry Killing tensors or Killing-Yano tensors of mixed type. This is facilitated by the close relation of ...
Thermoluminescence characteristics of GaSe and Ga2Se3 single crystals Isik, M.; SARIGÜL, NESLİHAN; Hasanlı, Nızamı (2022-06-01) GaSe and Ga2Se3 are semiconducting compounds formed from same constituent elements. These compounds have been attractive due to their optoelectronic and photovoltaic applications. Defects take remarkable attention since th...
Tribology at the atomic scale with density functional theory Toffoli, Hande; Toffoli, Daniele (2022-06-01) © 2022 IOP Publishing Ltd.Understanding the quantum mechanical origins of friction forces has become increasingly important in the past decades with the advent of nanotechnology. At the nanometer scale, the universal Amont...
The spin effects on electronic, optical and mechanical properties of new ferromagnetic chalcopyrite: YMnS2 Yıldız, Buğra; Erkisi, Aytac; Sürücü, Gökhan (2022-05-15) In this study, magnetic and electronic nature, optical behavior, and elasticity properties of YMnS2 compound have been investigated by using density functional theory (DFT). The compound belongs to the chalcopyrite family ...
Tuning structural, electrical, and THz optical properties of VxOy films with W-doping Atik, Bahar; Dirican, Emrah; Demirors, Oytun; Altan, Hakan; Esentürk, Okan; Yildirim, Mustafa; Akın, Tayfun (2022-05-01) Vanadium oxide plays a crucial role as the temperature-sensitive layer of microbolometers. This layer should possess a high temperature coefficient of resistance (TCR) along with a desirable resistivity suitable for readou...

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