Concept
Poynting vector
Related publications (82)
Dynamical system approach to navigation around obstacles
In this article, we propose a dynamical system to avoid obstacles which are star shaped and simultaneously converge to a goal. The convergence is almost-global in a domain and the stationary points are identified explicitly. Our approach is based on the id ...
2024A synthetic phase-contrast imaging diagnostic with spatial filtering for gyrokinetic simulations
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A Phase-contrast imaging (PCI) diagnostic provides measurements of line-integrated electron density fluctuations. Localisation along the laser beam path can be achieved with a spatial filter that selects the wave-vector directions of the fluctuations contr ...
IOP Publishing Ltd2023ALMOST EVERYWHERE NONUNIQUENESS OF INTEGRAL CURVES FOR DIVERGENCE-FREE SOBOLEV VECTOR FIELDS
We construct divergence-free Sobolev vector fields in C([0,1];W-1,W-r(T-d;Rd)) with r < d and d\geq 2 which simultaneously admit any finite number of distinct positive solutions to the continuity equation. These vector fields are then shown to have at leas ...
Philadelphia2023Long-distance coherent propagation of magnon polarons in a ferroelectric-ferromagnetic heterostructure
Jean-Philippe Ansermet, Haiming Yu, Peng Chen, Jilei Chen, Jianyu Zhang, Yao Zhang, Song Liu, Jinlong Wang
We experimentally demonstrate the coherent propagation of magnon polarons, the hybridized excitations formed by the coupling of spin waves and Rayleigh/Love surface acoustic waves, in a heterostructure consisting of ferroelectric BaTiO3 and ferromagnetic L ...
College Pk2023Direct observation of exchange anisotropy in the helimagnetic insulator Cu2OSeO3
Arnaud Magrez, Priya Ranjan Baral, Jonathan White, Chen Luo
The helical magnetic structures of cubic chiral systems are well explained by the competition among Heisen-berg exchange, Dzyaloshinskii-Moriya interaction, cubic anisotropy, and anisotropic exchange interaction (AEI). Recently, the role of the latter has ...
AMER PHYSICAL SOC2023Magnetic force microscopy contrast formation and field sensitivity
The magnetic force microscope (MFM) is an established experimental tool for imaging stray fields with high spatial resolution and sensitivity. The MFM contrast can however contain contributions from the sample topography, variations in the surface Kelvin p ...
2022Conformal and chiral phase transitions in Rydberg chains
Frédéric Mila, Natalia Chepiga, Ivo Aguiar Maceira
Using density matrix renormalization group simulations on open chains, we map out the wave vector in the incommensurate disordered phase of a realistic model of Rydberg chains with 1/r6 interactions, and we locate and characterize the points along the comm ...
AMER PHYSICAL SOC2022Extension of Lorentz reciprocity and Poynting theorems for spatially dispersive media with quadrupolar responses
We provide a self-consistent extension of the Lorentz reciprocity theorem and the Poynting theorem for media possessing electric and magnetic dipolar and quadrupolar responses related to electric and magnetic fields and field gradients thus corresponding t ...
AMER PHYSICAL SOC2021Multipolar origin of electromagnetic transverse force resulting from TE/TM wave interference
Olivier Martin, Karim Achouri, Andrei Kiselev
In this paper, we aim at unveiling the underlying physical mechanism for transversal optical forces, appearing due to the simultaneous illumination of a spherical object with two plane waves possessing different polarizations. The appearance of such a tran ...
2021Instantaneous radiation from time-varying electric and magnetic dipoles
Romain Christophe Rémy Fleury, Mohammad Sajjad Mirmoosa
Radiation from magnetic and electric dipole moments is a key subject in the theory of electrodynamics. Although people treat the problem thoroughly in the context of the frequency domain, the problem is still not well understood in the context of the time ...
2020