Results 31 to 40 of about 906,320 (164)
The use of the Poynting vector in interpreting ULF waves in magnetospheric waveguides [PDF]
, 2015 T.E. would like to thank STFC for financial support for a doctoral training grant. Date of Acceptance: 04/12/2014We numerically model ultralow frequency (ULF) waves in the magnetosphere assuming an ideal, low-beta inhomogeneous plasma waveguide.
T. Elsden +5 more
core +1 more source
Revisit the Poynting vector in PT-symmetric coupled waveguides
, 2022 We show that the time-averaged Poynting vector in parity-time (PT ) symmetric coupled waveguides is always positive and cannot explain the stopped light at exceptional points (EPs).
Zhang, Xin-Zhe, Luo, Ru-Zhi, Chen, Jing
core +2 more sources
Formation of an elongated region of energy backflow using ring apertures [PDF]
Компьютерная оптика, 2019 In this paper, we have investigated the focusing of a second-order cylindrical vector beam by using a high numerical aperture (NA) lens limited by a ring aperture using the Richards-Wolf formulae.
Sergey Stafeev, Victor Kotlyar
doaj +1 more source
Energies, 2020 Reservoir parameter estimation is one of the goals of amplitude-versus-angle (AVA) inversion and angle-domain common image gathers are the basis of AVA inversion.
Zhe Yan, Yonglong Yang, Shaoyong Liu
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Educación Química, 2018 John Henry Poynting (1852-1914) es conocido por sus trabajos relacionados con la determinación del efecto de la presión sobre los cambios de fase y la presión osmótica (efecto Poynting) ; la determinación de la constante de la gravedad y la densidad ...
Jaime Wisniak
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Frequency dependent power and energy flux density equations of the electromagnetic wave
Results in Physics, 2017 The calculation of the power and energy of the electromagnetic wave is important for numerous applications. There are some equations to compute the power and energy density of the electromagnetic wave radiation.
M. Muhibbullah +2 more
doaj +1 more source
IEEE Open Journal of Antennas and Propagation, 2023 In classical antenna theory, the Thévenin equivalent circuit is a commonly used tool to analyze the characteristics of receiving antennas. However, when dealing with a lossy antenna that is near a large load impedance, this circuit has limitations
Junming Diao, Lu Liu
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Profile Inversion and Closed Form Formulation of Compact GRIN Lenses
IEEE Open Journal of Antennas and Propagation, 2021 New formulas for the design of cylindrical Graded-Index (GRIN) lens-antennas with integrated feeder are presented. The possibility of integrating the feeder within the lens makes the system more compact, avoids complex mechanical design and alignment ...
Francesca Maggiorelli +4 more
doaj +1 more source
Linear to circular polarization conversion in the sharp focus of an optical vortex [PDF]
Компьютерная оптика, 2021 We have shown that when sharply focusing a linearly polarized optical vortex with topological charge 2, in the near-axis region of the focal plane, not only does a reverse energy flow (the negative on-axis projection of the Poynting vector) occur, but ...
A.G. Nalimov, S.S. Stafeev
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Generalized Poincaré Beams in Tight Focus
Photonics, 2023 We study the tight focus of generalized (hybrid) Poincaré beams. A conventional Poincaré beam is a coaxial superposition of two optical vortices, one with left circular polarization and a topological charge (TC) of m, while the other has a right circular
Victor V. Kotlyar +2 more
doaj +1 more source