Department of Physics
Recent Submissions
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Angstrom thick ZnO passivation layer to improve the photoelectrochemical water splitting performance of a TiO 2 nanowire photoanode: The role of deposition temperature
(Nature Publishing Group, 2018)In this paper, we demonstrate that angstrom thick single atomic layer deposited (ALD) ZnO passivation can signifcantly improve the photoelectrochemical (PEC) activity of hydrothermally grown TiO2 NWs. It is found that this ... -
A computational molecular approach on chitosan vehicle for metformin
(ICC, 2019)Density functional theory (DFT) calculations have been performed to study properties of chitosan (Chit) as a possible vehicle for carrying metformin (Met) drug. To this aim, the singular molecules of Met and Chit have been ... -
Nonradiative energy transfer between doped and undoped flat semiconductor nanocrystals of colloidal Quasi-2D nanoplatelets
(American Chemical Society, 2019)Atomically flat colloidal semiconductors such as nanoplatelets (NPLs) promise great potential for different optoelectronic applications. Here, we systematically investigate the excitonic energy transfer from colloidal ... -
Null aether theory: pp-wave and AdS wave solutions
(Institute of Physics Publishing Ltd., 2019)General quantum gravity arguments predict that Lorentz symmetry might not hold exactly in nature. This has motivated much interest in Lorentz breaking gravity theories recently. Among such models are vector-tensor theories ... -
Ultra-broadband near-unity light absorption by disjunct scattering resonances of disordered nanounits created with atomic scale shadowing effect
(Springer, 2020)Metamaterial perfect absorbers have been the subject of many studies in recent years. Near-unity light harvesting in an ultra-broadband frequency range is the prime goal in many applications such as photoconversion systems. ... -
An all-dielectric metasurface coupled with two-dimensional semiconductors for thermally tunable ultra-narrowband light absorption
(Springer, 2020)Two-dimensional (2D) transition metal dichalcogenides (TMDCs) have attracted tremendous attention over the past decades. Due to their unique features such as high mobility and direct bandgap, they are suitable candidate ... -
Multi-GHz burst-mode fiber lasers
(Institute of Electrical and Electronics Engineers, 2020)Ultrafast lasers with GHz repetition rates is necessary to access the highly efficient ablation-cooled laser-material processing regime. Burst-mode operation allows access to such high repetition rates at microjoule-level ... -
Magnetic ground state in FeTe2,VS2, and NiTe2 monolayers: antiparallel magnetic moments at chalcogen atoms
(American Physical Society, 2020)Our analysis based on the results of hybrid and semilocal density-functional calculations with and without Hubbard U correction for on-site Coulomb interactions reveals the true magnetic ground states of three transition-metal ... -
Joule-Thomson temperature of a triplon system of dimerized quantum magnets
(Elsevier, 2020)It is well known that, for a system of atomic (molecular) gases both kinds of processes, isentropic as well as isenthalpic are realizable and widely used in refrigeration technique. Particularly, magnetic refrigeration ... -
Real-time image-based droplet measurement
(Chemical and Biological Microsystems Society, 2020)The ability to measure physical properties of droplets in real-time is required to design precise operations on droplet-based systems. In this study, we implemented a real-time droplet tracker that tracks the positions of ... -
Josephson current between two p-wave superconducting nanowires in the presence of Rashba spin-orbit interaction and Zeeman magnetic fields
(Elsevier, 2020)Josephson current between two one-dimensional nanowires with proximity induced p-wave superconducting pairing is calculated in the presence of Rashba spin-orbit interaction, in-plane and normal magnetic fields. We show ... -
Defect states in monolayer hexagonal BN: A comparative DFT and DFT-1/2 study
(Elsevier, 2020)Hexagonal boron nitride (h-BN) acts like a semiconductor vacuum to point defects enabling stable and controllable spin states at room temperature which qualifies them for quantum technological applications. To characterize ... -
Optical gain in ultrathin self‐assembled bi‐layers of colloidal quantum wells enabled by the mode confinement in their high‐index dielectric waveguides
(Wiley-VCH Verlag, 2020)This study demonstrates an ultra‐thin colloidal gain medium consisting of bi‐layers of colloidal quantum wells (CQWs) with a total film thickness of 14 nm integrated with high‐index dielectrics. To achieve optical gain ... -
Deep subwavelength light confinement in disordered bismuth nanorods as a linearly thermal‐tunable metamaterial
(Wiley-VCH Verlag, 2020)Materials with a tunable optical response that can be controllably tailored using external stimuli excitation have undergone considerable research effort for the development of active optical devices, such as thermo‐optical ... -
Strong plasmon-wannier mott exciton interaction with high aspect ratio colloidal quantum wells
(Cell Press, 2020)The strong interaction between excitons and plasmons, manifested as Rabi splitting of the eigen energies, is of fundamental interest for manipulating photons in nanoscale devices. Thanks to their enhanced photostability ... -
Erratum: controlling the dynamics of colloidal particles by critical Casimir forces (Soft Matter (2019) 15 (2152-2162) DOI: 10.1039/C8SM01376D)
(Royal Society of Chemistry, 2020)Correction for ‘Controlling the dynamics of colloidal particles by critical Casimir forces’ by Alessandro Magazzù et al., Soft Matter, 2019, 15, 2152–2162, DOI: 10.1039/C8SM01376D. The authors regret an error in the grant ... -
Universality of dissipative self-assembly from quantum dots to human cells
(Nature Research, 2020)An important goal of self-assembly research is to develop a general methodology applicable to almost any material, from the smallest to the largest scales, whereby qualitatively identical results are obtained independently ... -
Plasmon-enhanced fluorescence in gold nanorod-quantum dot coupled systems
(Institute of Physics Publishing, 2020)Plasmon–exciton coupling is of great importance to many optical devices and applications. One of the coupling manifestations is plasmon-enhanced fluorescence. Although this effect is demonstrated in numerous experimental ... -
Optical trapping of microparticles and yeast cells at ultra-low intensity by intracavity nonlinear feedback forces
(SPIE, 2020)In standard optical tweezers optical forces arise from the interaction of a tightly focused laser beam with a microscopic particle. The particle is always outside the laser cavity and the incoming beam is not affected by ...
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