Results 51 to 60 of about 1,764,811 (237)

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, Alejandro Castellanos Jaramillo   +1 more
doaj   +2 more sources

Measuring of Transverse Energy Flows in a Focus of an Aluminum Lens

Photonics, 2022
In this study, we theoretically and experimentally investigate the propagation of a second-order cylindrical vector beam through an aluminum lens which forms a tight focus at the distance of the wavelength. Simulation by the finite-difference time-domain
Elena Kozlova, Sergey Stafeev, Sergey Fomchenkov, Vladimir Podlipnov, Alexandra Savelyeva, Victor Kotlyar   +5 more
doaj   +1 more source

Squared-field amplitude modulus and radiation intensity nonequivalence within nonlinear slabs

, 2004
This paper presents a novel approach to wave propagation inside the Fabry-Perot framework. It states that the time-averaged Poynting vector modulus could be nonequivalent with the squared-field amplitude modulus.
Alberto Lencina, D. A. B. Miller, J. D. Jackson, M. Sheik-Bahae, N. I. Koroteev, Pablo Vaveliuk   +5 more
core   +1 more source

Losses and orbital part of the Poynting vector of air-core modes in hollow-core fibers

Компьютерная оптика
In 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, S.S. Stafeev, A.D. Pryamikov   +2 more
doaj   +1 more source

Towards gravitationally assisted negative refraction of light by vacuum

, 2004
Propagation of electromagnetic plane waves in some directions in gravitationally affected vacuum over limited ranges of spacetime can be such that the phase velocity vector casts a negative projection on the time-averaged Poynting vector. This conclusion
, Akhlesh Lakhtakia, Chen H C, Foster J, Garcia N, Koopmans L V E, Kärkkäinen M K, Lakhtakia A, Mackay T G, Mackay T G, Mackay T G, Pendry J B, Sachs M, Skrotskii G V, Tom G Mackay   +14 more
core   +1 more source

Broadband Directional Thermal Radiation with Asymmetric Femtosecond Laser‐Processed Surfaces

Advanced Optical Materials, EarlyView.
Femtosecond laser processing is used to scalably create self‐organized angled microstructures which exhibit highly directional emissivity that occurs for all polarizations. Laser parameters are tuned to alter the surface features, control the direction of emission, and enhance the directional emissivity. Electromagnetic modeling is performed to analyze
Andrew Butler, Andrew Reicks, Jack Schulz, Patrick Hayden, Alireza Kalantari Dehaghi, Kira Marr, Linxiao Zhu, Christos Argyropoulos, Craig Zuhlke   +8 more
wiley   +1 more source

Dependence of Poynting Vector on State of Polarization

Photonics
It is known that the Poynting vector in a plane electromagnetic field is always along its propagation direction irrespective of its polarization state.
Xiao-Lu You, Ming Shen, Chun-Fang Li
doaj   +1 more source

Frame dragging, vorticity and electromagnetic fields in axially symmetric stationary spacetimes

, 2006
We present a general study about the relation between the vorticity tensor and the Poynting vector of the electromagnetic field for axially symmetric stationary electrovacuum metrics.
Barnes A, Bel L, Bonnor W B, Bonnor W B, De Felice F, Dunsby P K S, Ehlers J, Ferrando J, G A González, Haddow B M, Herrera L Santos N O Carot J, Hoenselaers C, Hogan P, J A Rueda, L A Pachón, L Herrera, Lozanowski C, Maartens R, Maartens R, Maartens R, Manko V S, Manko V S, McIntosh C, Papapetrou A, Stephani H, Van den Bergh N, Van den Bergh N, van Elst H, van Elst H   +28 more
core   +4 more sources

Spectral‐Integrated Thermal Absorption Model for Broadband Laser‐Protective Reflectors Under Supercontinuum Irradiation

Advanced Science, EarlyView.
A universal laser absorption model based on spectral integration enables the design of ultrabroadband dielectric multilayer reflectors for laser protection. The model reveals exponential decay of absorption characterized by two coefficients, and a design that prioritizes short‐wavelength reflection minimizes heating.
Yukang Feng, Yanzhi Wang, Yulin Zhang, Yesheng Lu, Yu Chen, Fanxin Meng, Huisong Hu, Zhongyang Xing, Jianda Shao   +8 more
wiley   +1 more source

Analysis of characteristics of paraxial vector Gaussian beams affecting the formation of microstructures in an azopolymer [PDF]

Компьютерная оптика, 2019
The paper considers paraxial Gaussian laser beams with different polarization states and their characteristics, such as the Poynting vector, gradient force, and force density, which are important for evaluating the effects of radiation on matter.
Svetlana Khonina, Sergey Kharitonov, Sergey Volotovsky, Vladimir Podlipnov, Nikolay Ivliev   +4 more
doaj   +1 more source