A5053039474- 2D Materials and Applications
- Graphene research and applications
- Plasmonic and Surface Plasmon Research
- MXene and MAX Phase Materials
- Gold and Silver Nanoparticles Synthesis and Applications
- Photonic and Optical Devices
- Molecular Junctions and Nanostructures
- Perovskite Materials and Applications
- Mechanical and Optical Resonators
- Chalcogenide Semiconductor Thin Films
- Advanced Fiber Laser Technologies
- Topological Materials and Phenomena
- Synthesis and Properties of Aromatic Compounds
- ZnO doping and properties
- Boron and Carbon Nanomaterials Research
- Copper-based nanomaterials and applications
- Electronic and Structural Properties of Oxides
- Spectroscopy and Quantum Chemical Studies
- Quantum Information and Cryptography
- Nonlinear Optical Materials Studies
- Zeolite Catalysis and Synthesis
- Statistical Mechanics and Entropy
- Semiconductor Quantum Structures and Devices
- Solid-state spectroscopy and crystallography
- Laser-Matter Interactions and Applications
Institute of Photonic Sciences
2021-2025
Izmir Institute of Technology
2014-2020
Dokuz Eylül University
2011
The layer dependent structural, electronic and vibrational properties of the 1T phase two dimensional (2D) platinum diselenide are investigated by means state-of-the-art first-principles calculations. main findings study are: (i) monolayer has a dynamically stable 2D octahedral structure with 1.66 eV indirect band gap, (ii) semiconducting nature 1T-PtSe2 monolayers remains unaffected even at high biaxial strains, (iii) top-to-top (AA) arrangement is found to be energetically most favorable...
The control of elastic and inelastic electron tunnelling relies on materials with well-defined interfaces. Two-dimensional van der Waals are an excellent platform for such studies. Signatures acoustic phonons defect states have been observed in current-to-voltage measurements. These features can be explained by direct electron-phonon or electron-defect interactions. Here we use a process that involves excitons transition metal dichalcogenides (TMDs). We study tunnel junctions consisting...
The structural, electronic, and magnetic properties of pristine, defective, oxidized monolayer TiS3 are investigated using first-principles calculations in the framework density functional theory. We found that a single layer is direct band gap semiconductor, bonding nature crystal fundamentally different from other transition metal chalcogenides. negatively charged surfaces makes this promising material for lubrication applications. formation energies possible vacancies, i.e. S, Ti, TiS,...
By employing density functional theory-based methods, the structural, vibrational, electronic, and magnetic properties of monolayer α-RuCl<sub>3</sub> were investigated.
The inelastic interaction between flying particles and optical nanocavities gives rise to entangled states in which some excitations of the latter are paired with momentum changes former. Specifically, free-electron entanglement nanocavity modes opens appealing opportunities associated strong capabilities electrons. However, achievable degree is currently limited by lack control over resulting state mixtures. Here, we propose a scheme generate pure designated optical-cavity separable states....
Abstract Luminescence constitutes a unique source of insight into hot carrier processes in metals, including those plasmonic nanostructures used for sensing and energy applications. However, being weak nature, metal luminescence remains poorly understood, its microscopic origin strongly debated, potential unraveling nanoscale dynamics largely unexploited. Here, we reveal quantum-mechanical effects the emanating from thin monocrystalline gold flakes. Specifically, present experimental...
Scattering between charges and collective modes in materials governs phenomena such as electrical resistance, energy dissipation, phase switching. Studying scattering requires simultaneous access to ultrafast momentum-resolved dynamics of single-particle excitations, which remains an experimental challenge. Here, we present time- electron loss spectroscopy, apply it graphite, demonstrating that large (Δ q ≃1.2 Å −1 ) photoexcited electron-hole pockets induce a renormalization in-plane bulk...
$\text{Ca}{(\text{OH})}_{2}$ crystals, well known as portlandite, are grown in layered form, and we found that they can be exfoliated on different substrates. We performed first principles calculations to investigate the structural, electronic, vibrational, mechanical properties of bulk, bilayer, monolayer structures this material. Different from other lamellar such graphite transition-metal dichalcogenides, intralayer bonding is mainly ionic, while interlayer interaction remains a weak...
Using density functional theory-based first-principles calculations, we investigate the stacking order dependence of electronic and vibrational properties ${\mathrm{HfS}}_{2}\ensuremath{-}\mathrm{Ca}{(\mathrm{OH})}_{2}$ heterobilayer structures. It is shown that while different types exhibit similar optical properties, they are distinguishable from each other in terms their properties. Our findings on following: (i) interlayer shear (SM) layer breathing (LBM) modes able to deduce...
High-harmonic generation (HHG), an extreme nonlinear optical phenomenon beyond the perturbation regime, is of great significance for various potential applications, such as high-energy ultrashort pulse with outstanding spatiotemporal coherence. However, efficient active control HHG still challenging due to weak light-matter interaction displayed by currently known materials. Here, we demonstrate optically controlled in monolayer semiconductors via engineering interband polarization. We find...
Promising applications in photonics are driven by the ability to fabricate crystal-quality metal thin films of controlled thickness down a few nanometers. In particular, these materials exhibit highly nonlinear response optical fields owing induced ultrafast electron dynamics, which is however poorly understood on such mesoscopic length scales. Here, we reveal new mechanism that controls metallic films, dominated electronic heat transport when sufficiently small. By experimentally and...
Ab initio calculations in the framework of many-body perturbation theory (MBPT) are performed to calculate electronic and optical properties monolayer bilayer blue phosphorene with different stacking configurations. It is found that configuration strongly affects band gap material. By solving Bethe-Salpeter equation (BSE) on top ${G}_{0}{W}_{0}$ calculation, binding energies, spectral positions, decomposition excitons configurations investigated. The most prominent two excitonic peaks...
Using first-principles density functional theory calculations, we systematically investigate the structural, electronic, and vibrational properties of bulk potential single-layer structures perovskitelike ${\mathrm{CsPb}}_{2}{\mathrm{Br}}_{5}$ crystal. It is found that while Cs atoms have no effect on electronic structure, their presence essential for formation stable crystals. The calculated spectra crystal reveal not only form but also forms are dynamically stable. Predicted can exhibit...
By performing density functional theory-based calculations, we investigate the structural, vibrational, electronic and magnetic properties of 2D monolayers, nanoribbons quantum dots MnSe<sub>2</sub>.
All-optical control of nonlinear photonic processes in nanomaterials is significant interest from a fundamental viewpoint and with regard to applications ranging ultrafast data processing spectroscopy quantum technology. However, these rely on high degree over the response, which still remains elusive. Here, we demonstrate giant broadband all-optical modulation second-harmonic generation (SHG) monolayer transition-metal dichalcogenides mediated by modified excitonic oscillation strength...
The diffusive motion of metal nanoparticles Au and Ag on monolayer between bilayer heterostructures transition dichalcogenides graphene are investigated in the framework density functional theory. We found that minimum energy barriers for diffusion possibility cluster formation depend strongly both type nanoparticle monolayers bilayers. Moreover, tendency to form clusters can be tuned by creating various Tunability characteristics adatoms van der Waals holds promise controllable growth...
In this study, the structural, mechanical, and vibrational properties of a recently discovered anisotropic ultra-thin material, black-arsenic (b-As), are investigated by using density functional theory.
By using density functional theory and non-equilibrium Green's function-based methods, we investigated the electronic transport properties of a TiS3 monolayer p-n junction. We constructed lateral junction on Li F adatoms. An applied bias voltage caused significant variability in In addition, spin-dependent current-voltage characteristics were analyzed. Important device found, such as negative differential resistance rectifying diode behaviors for spin-polarized currents These prominent...
Nonlinear light–matter interactions in structured materials are the source of exciting properties and enable vanguard applications photonics. However, magnitude nonlinear effects is generally small, thus requiring high optical intensities for their manifestation at nanoscale. Here, we reveal a large response monolayer hexagonal boron nitride (hBN) mid-infrared phonon–polariton region, triggered by strongly anharmonic potential associated with atomic vibrations this material. We present...
The relaxation dynamics of a Blume-Capel model with quenched diluted crystal field is formulated by method combining the statistical equilibrium theory and thermodynamics linear irreversible processes. Using mean-field approximation for magnetic Gibbs free-energy production, generalized force current are defined within thermodynamics. Next kinetic equation magnetization obtained response theory. Finally, temperature dependence time in neighborhood phase-transition points solving...
Electronic states and their dynamics are of critical importance for electronic optoelectronic applications. Here, various relevant in monolayer MoS2 , such as multiple excitonic Rydberg free-particle energy bands probed with a high relative contrast up to ≥200 via broadband (from ≈1.79 3.10 eV) static third-harmonic spectroscopy (THS), which is further supported by theoretical calculations. Moreover, transient THS introduced demonstrate that generation can be all-optically modulated...