Results 11 to 20 of about 9,968,007 (375)
Optical skyrmion lattice in evanescent electromagnetic fields [PDF]
Science, 2018 Generating a lattice of optical skyrmions The topological properties of systems can be robust to defects and imperfections. Skyrmions are one such topological entity, which resemble “hedgehog-like” structures. Tsesses et al.
S. Tsesses +5 more
semanticscholar +1 more source
Atomic scale memristive photon source
Light: Science & Applications, 2022 Photon emission is observed during the resistive switching process of memristors with an atomic-sized footprint and a scalable fabrication procedure.
Bojun Cheng +11 more
doaj +1 more source
Power Electronic Devices and Components, 2022 This paper presents a study of a two-level inverter. It proposes a modulation scheme for inverters featuring zero-voltage switching (ZVS) with both fixed and variable switching frequency operation. The control scheme uses a hybrid method to determine the
Benedikt Kohlhepp +2 more
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Tbit/s line-rate satellite feeder links enabled by coherent modulation and full-adaptive optics
Light: Science & Applications, 2023 Free-space optical (FSO) communication technologies constitute a solution to cope with the bandwidth demand of future satellite-ground networks. They may overcome the RF bottleneck and attain data rates in the order of Tbit/s with only a handful of ...
Yannik Horst +14 more
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Pseudo-electromagnetic fields in 3D topological semimetals [PDF]
Nature Reviews Physics, 2019 Dirac and Weyl semimetals react to position-dependent and time-dependent perturbations, such as strain, as if subject to emergent electromagnetic fields, known as pseudo-fields.
R. Ilan, A. Grushin, D. Pikulin
semanticscholar +1 more source
Generalized Efficiency and the Uncertainty of Millimeter Wave Power Standard [PDF]
Advances in Radio Science, 2023 In the last decade, waveguide thermoelectric power sensors have been established as an alternative to thermistor mounts for millimeter wave power standards, and due to the detection principle and the nature of waveguides, the generalized efficiency is ...
W. K. Perangin-Angin +4 more
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VSI electromagnetic fields [PDF]
The Fourteenth Marcel Grossmann Meeting, 2017 A $p$-form $F$ is VSI (i.e., all its scalar invariants of arbitrary order vanish) in a $n$-dimensional spacetime if and only if it is of type N, its multiple null direction $l$ is "degenerate Kundt", and $ _{l}F=0$. This recent result is reviewed in the present contribution and its main consequences are summarized.
Ortaggio, M. (Marcello) +1 more
openaire +5 more sources
Holographic imaging of electromagnetic fields via electron-light quantum interference [PDF]
Science Advances, 2018 The quantum interference between ultrafast light and electron pulses enables the holographic reconstruction of nanoscale fields. Holography relies on the interference between a known reference and a signal of interest to reconstruct both the amplitude ...
I. Madan +9 more
semanticscholar +1 more source
Near-field radiation pattern distortion of antenna attached to wall in through-the-wall radar imaging [PDF]
Advances in Radio Science, 2013 No abstract available.
B. Cetin +2 more
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Yield Optimization using Hybrid Gaussian Process Regression and a Genetic Multi-Objective Approach [PDF]
Advances in Radio Science, 2021 Quantification and minimization of uncertainty is an important task in the design of electromagnetic devices, which comes with high computational effort.
M. Fuhrländer +3 more
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