A5073724321- Optical Polarization and Ellipsometry
- Terahertz technology and applications
- 2D Materials and Applications
- Molecular spectroscopy and chirality
- Gyrotron and Vacuum Electronics Research
- Plasmonic and Surface Plasmon Research
- Photonic and Optical Devices
- Superconducting and THz Device Technology
- Transport and Logistics Innovations
- Leaf Properties and Growth Measurement
- Spectroscopy and Quantum Chemical Studies
- Spectroscopy and Chemometric Analyses
- Topological Materials and Phenomena
- Semiconductor Quantum Structures and Devices
- Metamaterials and Metasurfaces Applications
- Transportation Systems and Logistics
- Perovskite Materials and Applications
- Surface Roughness and Optical Measurements
- Advanced Sensor and Energy Harvesting Materials
- Education, Psychology, and Social Research
- Muscle activation and electromyography studies
- Chalcogenide Semiconductor Thin Films
- Neuroscience and Neural Engineering
- Quantum and electron transport phenomena
- Photonic Crystals and Applications
VSB - Technical University of Ostrava
2018-2024
University of Hartford
2022
Norwegian University of Science and Technology
2021
Abstract Platinum diselenide () is a promising two‐dimensional (2D) material for the terahertz (THz) range as, unlike other transition metal dichalcogenides (TMDs), its bandgap can be uniquely tuned from semiconductor in near‐infrared to semimetal with number of atomic layers. This gives unique THz photonic properties that layer‐engineered. Here, we demonstrate controlled nonlinearity—tuned monolayer bulk —can realized wafer size polycrystalline through generation ultrafast photocurrents and...
We report on a one-dimensional photonic crystal (1DPhC) represented by multilayer structure used for surface plasmon-like sensing based Bloch waves and radiation modes employing comprising glass substrate four bilayers of TiO 2 /SiO with termination layer .We model the reflectance responses in Kretschmann configuration coupling prism made BK7 express reflectances both (s p) polarizations spectral domain various angles incidence to show that sharp dip associated wave (BSW) excitation is...
Abstract Unlike traditional group‐6 transition metal dichalcogenides (TMDs), group‐10 TMDs such as PtSe 2 and PdTe possess highly tuneable indirect bandgaps, transitioning from semiconducting in the near‐infrared to semimetal behavior with a number of monolayers (MLs). This opens up possibility TMD‐based mid‐infrared terahertz optoelectronics. Despite this large potential, optical properties materials have shown an extremely disparity between that predicted measured. For example, simulations...
Spectroscopic Mueller matrix ellipsometry is becoming increasingly routine across physical branches of science, even outside optics. The highly sensitive tracking the polarization-related properties offers a reliable and non-destructive analysis virtually any sample at hand. If coupled with model, it impeccable in performance irreplaceable versatility. Nonetheless, this method rarely adopted interdisciplinarily, when is, often plays supporting role, which does not take benefit its full...
Spintronic Terahertz Emitters (STE) represent a significant advancement in source technology, exploiting the ultrafast demagnetization process of spin-electrons to unveil 30THz wide, gapless spectrum, accessible through femtosecond lasers across full VIS-IR range. This innovation not only positions STEs as pivotal THz technology but also underscores their role cost-effective, high-performance solution, thereby redefining standards within field. However, inherent spintronic nature these...
Optically pumped spintronic terahertz emitters (STEs) have, in less than a decade, strongly impacted (THz) source technology, by the combination of their Fourier‐limited ultrafast response, phononless emission spectrum and wavelength‐independent operation. However, intrinsic strength inverse spin Hall effect governing these devices introduces challenge: optical‐to‐terahertz conversion efficiency is considerably lower traditional sources. It therefore primordial to maximize at least...
Spintronic Terahertz Emitters In article number 2400064, Mathias Vanwolleghem and co-workers experimentally demonstrate a close to 100-fold improvement of the power efficiency inverse spin Hall emitters by maximizing impact electromagnetic environment nanometric emitter. As result, moving from basic emitter on bare substrate one functionalized resonant crystal cavity an impedance matched emitting substrate, emitted THz field pulses can reach several MV/cm peak strengths without any echo behavior.
Mueller matrix ellipsometry has been used to precisely characterize quartz waveplates for demanding applications in the semiconductor industry and high precision polarimetry. We have found this experimental technique be beneficial use because it enables us obtain absolute precise measurement of retardation a wide spectral range, waveplate orientation, compound adjustment. In paper, necessity including optical activity model data treatment is demonstrated. Particularly, influences adjustment...
Optical metasurface technology promises an important potential for replacing bulky traditional optical components, in addition to enabling new compact and lightweight metasurface-based devices. Since even subtle imperfections design or manufacture strongly affect their performance, there is urgent need develop proper accurate protocols characterization, allowing efficient control of the fabrication. We present non-destructive spectroscopic Mueller matrix ellipsometry uncommon off-specular...
In this paper, the authors characterize high-order quartz waveplates in wide spectral range (from 193 to 1700 nm) using a commercial Mueller matrix ellipsometer RC2-DI-Woollam. They demonstrate that ellipsometry is powerful tool obtain waveplate retardation together with azimuthal angles of optical axes good accuracy. Moreover, they deal depolarization caused by finite monochromator bandwidth, which included model incoherent averaging matrices. The application Lu–Chipman decomposition...
Platinum diselenide (PtSe2) is a promising two-dimensional (2D) material for the terahertz (THz) range as, unlike other transition metal dichalcogenides (TMDs), its bandgap can be uniquely tuned from semiconductor in near-infrared to semimetal with number of atomic layers. This gives unique THz photonic properties that layer-engineered. Here, we demonstrate controlled nonlinearity - monolayer bulk PtSe2 realised wafer size polycrystalline through generation ultrafast photocurrents and...
The optical activity measurements have been widely performed using a simple polarimeter with monochromatic source so far. This work introduces versatile and technique of the Mueller matrix spectroscopic ellipsometer (Woollam RC2-DI) spectral range from 0.73 eV to 6.42 (wavelength 193 nm 1700 nm). First, we present chiral solutions under constant temperature, where dependences on solution concentration were determined. measured spectra compared dispersion model specific rotatory powers...
Chirality – the non-superimposability of an object on its mirror image shows twists at all scales, from giant stellar galaxies to electronic structure materials. It enters into nearly every aspect everyone's daily routine without acknowledging it. Yet, it governs stereochemistry molecular processes in nature, making them life-forming or life-incompatible. makes knowledge spatial configuration essential pharmacy, medicine, and biochemistry. Here, by combining spectroscopic Mueller matrix...
As a two-dimensional (2D) material for terahertz (THz) applications, platinum diselenide (PtSe <inf xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</inf> ) can be uniquely tuned from semiconductor in the near infrared to semimetal with number of atomic layers, contrast other transition metal dichalcogenides (TMDs). Consequently, has unique photonic properties at THz frequencies that enhanced by layer engineering. Here, we demonstrate controlled...
The boom in terahertz technologies of the last few decades is now not limited to use electric charge, but also fully exploits spin. Revolutionary spintronic emitters (STEs) offer versatile usage under a wide range visible and infrared excitation wavelengths, arbitrary reflection/transmission geometries, utilization with most femtosecond oscillators amplifiers. STE emission results 30THz-broad gapless spectrum easily controllable polarization. However, optical-to-terahertz conversion...
Wide-pulse (≥ 1 ms) high-frequency (up to 100 Hz) neuromuscular electrical stimulation (WPHF NMES) has drawn attention recently. However, it is unknown whether the WPHF NMES-evoked force and stimulation-induced muscle fatigue would differ between sexes. PURPOSE: This pilot study aims examine potential sex differences in level elbow flexor muscles. METHODS: Thirteen adults (7 men: age = 21 ± 3 years, height 177.2 3.3 cm, body mass 83.4 12.6 kg; 6 women: 22 162.7 7.6 57.8 4.3 kg) completed...