A5026361894- Photonic and Optical Devices
- Advanced Fiber Optic Sensors
- Cold Atom Physics and Bose-Einstein Condensates
- Advanced Fiber Laser Technologies
- Laser Material Processing Techniques
- Nonlinear Photonic Systems
- Photonic Crystal and Fiber Optics
- Laser-Matter Interactions and Applications
- Non-Invasive Vital Sign Monitoring
- Quantum optics and atomic interactions
- Atomic and Subatomic Physics Research
- Respiratory Support and Mechanisms
- Optical Network Technologies
- ECG Monitoring and Analysis
- Quantum Information and Cryptography
- Quantum Mechanics and Non-Hermitian Physics
- Photonic Crystals and Applications
- Semiconductor Lasers and Optical Devices
- Astrophysics and Cosmic Phenomena
- Strong Light-Matter Interactions
- Topological Materials and Phenomena
- Advanced Mathematical Modeling in Engineering
- Particle Accelerators and Free-Electron Lasers
- Advanced Photonic Communication Systems
- Microtubule and mitosis dynamics
University of Belgrade
2013-2024
Deutsches Elektronen-Synchrotron DESY
2019-2024
Center for Free-Electron Laser Science
2019-2024
Universität Hamburg
2019-2024
Vinča Institute of Nuclear Sciences
2011-2024
Walsh University
2023-2024
Deutsches Zentrum für Luft- und Raumfahrt e. V. (DLR)
2023
Technische Universität Berlin
2021
Institute of Economic Sciences
2011-2019
University of Novi Sad
2014-2017
Several groups have recently claimed evidence for an unaccounted gamma-ray excess over {the} diffuse backgrounds at few GeV in Fermi-LAT data a region around the Galactic Center, consistent with dark matter annihilation origin. We demonstrate that main spectral and angular features of this can be reproduced if they are mostly due to inverse Compton emission from high-energy electrons injected burst event ~10^52 - 10^53erg roughly O(10^6) years ago. consider example as proof principle...
Several groups of authors have analyzed Fermi LAT data in a region around the Galactic Center finding an unaccounted gamma-ray excess over diffuse backgrounds GeV energy range. It has been argued that it is difficult or even impossible to explain this emission by leading astrophysical candidates - millisecond pulsars (MSPs). Here we provide new estimate contribution population yet unresolved MSP located bulge Milky Way. We simulate with GALPLOT package adopting parametric approach, range...
<para xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> Sensing properties of long-period gratings (LPGs) fabricated in photonic crystal fibers by an electric arc are explained and quantified semianalytical numerical models. In particular, the grating's insensitivity to temperature simultaneous sensitivity strain refractive index simulated. The modeling procedure is generalized so that it can be applied a wide range LPGs various fibers. </para>
Flat band lattice systems promote the appearance of perfectly compact bulk states, whereas topology favors edge localization. In this work, we report existence topological states on flux-dressed photonic graphene ribbons. We found that robust localization is achieved through a synergy Aharonov-Bohm caging and protection mechanisms. The nontriviality characterized both theoretical derivations experimental observations an integer Zak phase obtained from mean chiral displacement. Experiments...
Matter–wave interferometry is a powerful tool for high-precision measurements of the quantum properties atoms, many-body phenomena and gravity. The most precise matter–wave interferometers exploit excellent localization in momentum space coherence degenerate gases. Further enhancement sensitivity reduction complexity are crucial conditions success widening their applications. Here we introduce multi-state interferometric scheme that offers advances both these aspects. coherent coupling...
Abstract Demand for densely packed wavelength demultiplexers has increased due to the rapid developments in information systems and sensing biomedical space applications. The required miniaturisation is problematic crosstalk high-density photonic circuits, while feature size complicates design at sub-micrometer wavelengths. As a solution, we propose based on wavelength-dependent self-imaging linearly coupled finite optical lattices. novel semi-analytical allows intuitive efficient control of...
In non-invasive ventilation, continuous monitoring of respiratory volumes is essential. Here, we present a method for the measurement by single fiber-grating sensor bending and provide proof-of-principle applying calibration-test procedure on set 18 healthy volunteers. Results establish linear correlation between change in lung volume corresponding local thorax curvature. They also show good accuracy measurements tidal minute different types breathing. The proposed technique does not rely...
The THz beamline at FLASH, DESY, provides both tunable (1–300 THz) narrow-bandwidth (∼10%) and broad-bandwidth intense (up to 150 uJ) pulses delivered in 1 MHz bursts naturally synchronized with free-electron laser X-ray pulses. Combination of these pulses, along the auxiliary NIR VIS ultrashort lasers, supports a plethora dynamic investigations physics, material science biology. unique features FLASH accelerator source, however, bring set challenges diagnostics their key parameters: pulse...
We introduce a discrete model for binary spin–orbit-coupled Bose–Einstein condensates trapped in deep one-dimensional optical lattice. Two different types of the couplings are considered, with spatial derivatives acting inside each species, or between species. The system inter-site dominated by spin–orbit coupling (SOC), while usual hopping is negligible, emulates composed extremely heavy atoms, as well those opposite signs effective atomic masses two components. Stable localized composite...
An experimental pump-probe study of the photoassociative creation translationally ultracold rubidium molecules is presented together with numerical simulations process. The formation loosely bound excited-state dimers observed as a first step toward fully coherent pump-dump approach to stabilization ${\text{Rb}}_{2}$ into its lowest ground vibrational states. population that contributes process characterized and found be distinct from background preassociated molecules.
<italic xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">Goal:</i> Clinical interpretation of an electrocardiogram (ECG) can be detrimentally affected by noise. Removal the electromyographic (EMG) noise is particularly challenging due to its spectral overlap with QRS complex. The existing EMG-denoising algorithms often distort signal morphology, thus obscuring diagnostically relevant information. xmlns:xlink="http://www.w3.org/1999/xlink">Methods:</i>...
The spectral properties of long-period gratings (LPGs) fabricated in photonic crystal fibers using femtosecond laser pulses by the point-by-point technique, without oil-immersion fiber, are investigated detail. Postfabrication monitoring at room temperature showed significant long-term instability and stable spectra only after 600 h. stabilized improved with increasing annealing temperature. observed changes resonant wavelength, optical strength, grating birefringence were correlated to...
Multicore fibers with linearly coupled cores are considered as a means of the coherent transport needed for high-capacity communication systems and high-power fiber lasers. The conditions existence stability light propagation in multicore circularly arranged derived. is modeled by linear discrete complex Ginzburg–Landau equation, while its eigenvalues found analytically. inverse eigenvalue problem proposing commensurability solved to find intercore coupling coefficients that support periodic...
This study investigated the effects of urbanization on spatial distribution, sources, and levels heavy metals pollution in urban soils city Belgrade. A total 126 composite topsoil (0–10 cm) subsoil (10–40 samples was collected within four zones (central, suburban, external, rural) Belgrade analysed for content, indices using statistical methods including descriptive statistics, correlation matrix, Principal Component Analysis (PCA). Concentration zinc (Zn), copper (Cu), cadmium (Cd),...
This paper describes experimental and numerical results of the plasma-assisted microfabrication subwavelength structures by means point-by point femtosecond laser inscription.It is shown that spatio-temporal evolution light plasma patterns critically depend on input power.Subwavelength inscription corresponds to supercritical propagation regimes when pulse power several times self-focusing threshold.Experimental profiles show quantitative agreement.
In this Letter, a multiport directional optical coupler based on periodic energy exchange in linear waveguide array is proposed. The power transfer achieved by choosing separations that render commensurate eigenvalues of the coupling matrix. This general solution and offers plethora possibilities. Particularly interesting an can be used to realize different couplers simply input waveguide. proposed design principle validated full numerical simulations realistic devices required fabrication...
Microfluidic devices composed of microslits in step-index optical fibers are thoroughly investigated. Numerical simulations performed to explain scattering and power loss such devices. Experimental results based on fabricated by femtosecond laser processing corroborate theoretical data. Dependency the device performance refractive index fluid slit is further utilized construct a sensor an in-fiber attenuator.
In this paper we present a theoretical model for simulating the behavior of polymer solar cell with poly(3-hexylthiophene):1-(3-methoxycarbonyl) propyl-1-phenyl-[6, 6]-methanofullerene (P3HT:PCBM) active layer. Two different types boundary conditions were considered, Dirichlet’s and mixed. For have achieved an excellent agreement experiment. The influence on appearance s-shaped current-voltage characteristic (sometimes observed in experiments) has been investigated. When mixed are applied,...