Results 31 to 40 of about 1,456 (141)
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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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
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The use of the Poynting vector in interpreting ULF waves in magnetospheric waveguides
, 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
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Transverse intensity at the tight focus of a second-order cylindrical vector beam
Компьютерная оптика, 2021 In this paper, an effect of a reverse energy flow at the focus of a second-order cylindrical vector beam which passed through amplitude zone plate was investigated with a scanning near-field optical microscope.
E.S. Kozlova +4 more
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Nonadditivity of Poynting vector within opaque media [PDF]
Journal of the Optical Society of America A, 2005 The energy flux within an opaque medium near an interface is not the sum of an incident plus a reflected term, as there is a synergistic contribution to the time-averaged Poynting vector that involves simultaneously both the incident and reflected fields.
Guillermo P, Ortiz, W Luis, Mochán
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Experimental test of the compatibility of the definitions of the electromagnetic energy density and the Poynting vector [PDF]
, 2004 It is shown that the generally accepted definition of the Poynting vector and the energy flux vector defined by means of the energy density of the electromagnetic field (Umov vector) lead to the prediction of the different results touching ...
Chubykalo, Andrew +5 more
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Visualization of a surface wave in an elastic medium via the complex Poynting vector
, 1998 The complex Poynting vector can be used to visualize not only the flow of energy in an elastodynamic solid, but also the wave itself passing through the elastic medium.
Dean, Cleon, Braselton, James P.
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DISPERSIÓN DE LUZ POR UNA NANOPARTÍCULA DE PLATA CON FORMA ESFEROIDAL PROLATA [PDF]
Epistemus, 2016 Usando el método de diferencias finitas en el dominio del tiempo se estudia la incidencia y dispersión de radiación electromagnética de una nanopartícula de plata con forma esferoidal prolata.
Arnulfo Castellanos Moreno +1 more
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Losses and orbital part of the Poynting vector of air-core modes in hollow-core fibers
Компьютерная оптикаIn our earlier works, we investigated a relationship between the formation of vortices in the transverse component of the Poynting vector of core modes and the regimes of strong localization of these modes in solid core micro-structured optical fibers ...
G.K. Alagashev +2 more
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