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EVOLUTION OF TRANSIENT ELECTROMAGNETIC FIELDS IN RADIALLY INHOMOGENEOUS NONSTATIONARY MEDIUM

Oleksandr M. Dumin, O. O. Dumina, Victor A. Katrich
2010 Electromagnetic Waves  
fields with arbitrary time dependence in spherical coordinate system.  ...  To solve radiation problems in time domain directly the modal representation of transient electromagnetic fields is considered.  ...  The operator of transient field transformation from an initial spherical boundary to another one is constructed.  ... 
doi:10.2528/pier10011909 fatcat:lmkyeyn765h4xelb72i37yaw5u

A Review of Elastic Light Scattering Theories

Thomas Wriedt
1998 Particle & particle systems characterization  
Mie theory is restricted to spherical, homogeneous, isotropic and non-magnetic particles in a non-absorbing medium.  ...  However, as microparticles are hardly ever spherical or homogeneous, there is much interest in more advanced scattering theories.  ...  With volume-based methods, the volume of the particle and, with some methods, also part of the surrounding medium is discretised.  ... 
doi:10.1002/(sici)1521-4117(199804)15:2<67::aid-ppsc67>3.0.co;2-f fatcat:alkldzpulbdenjdhpvsoap4rui

Transmission and radiation of an accelerating mode in a photonic band-gap fiber

C.-K. Ng, R. J. England, L.-Q. Lee, R. Noble, V. Rawat, J. Spencer
2010 Physical Review Special Topics. Accelerators and Beams  
be excited by high-power lasers.  ...  In this paper, we develop a simulation method using the parallel finite-element electromagnetic suite ACE3P to study the propagation of the accelerating mode in the PBG fiber and determine the radiation  ...  Acknowledgements We would like to thank Eric Colby for many useful discussions and use of his Matlab code, and Greg Schussman for help with visualization.  ... 
doi:10.1103/physrevstab.13.121301 fatcat:yx6ciqypwratfn4htyfufzj73m

Quasi-optical Systems Based on Periodic Structures [chapter]

Gennadij Vorobjov, Yulya Shulga, Vitaliy Zhurbenko
2011 Electromagnetic Waves  
In order to analyze the physical phenomena of the electromagnetic wave excitation in the layered metal-dielectric structure, the electromagnetic field can be represented as a composition of plane electromagnetic  ...  volume exciting the wave along its axis.  ...  This book is dedicated to various aspects of electromagnetic wave theory and its applications in science and technology.  ... 
doi:10.5772/17010 fatcat:v7glmbv2hbejrg2cgjrahfg2lm

On the transmission line model for lightning return stroke representation

Y. Baba, V. A. Rakov
2003 Geophysical Research Letters  
This research was supported in part by Doshisha University and by NSF grant ATM-0003994. The authors would like to thank W. W. Hager, B. Kordi, R. Thottappillil, and M. A.  ...  In both cases, the electromagnetic field structure is a spherical TEM wave.  ...  Thus, in this special case (v = c), the electromagnetic field structure is a spherical transverse electromagnetic (TEM) wave. Thottappillil et al.'  ... 
doi:10.1029/2003gl018407 fatcat:iawg42mzdrgyri36icj5ineo2a

Quantum electrodynamics of one-photon wave packets [article]

M. Stobińska, G. Alber, G. Leuchs
2010 arXiv   pre-print
two-level system, with many-mode one-photon quantum states of the electromagnetic field.  ...  In particular, we concentrate on the question how the engineering of electromagnetic field modes influences the atom-field interaction.  ...  If we consider an electromagnetic field in a cubic quantization volume of length L and volume V = L 3 and impose periodic boundary conditions a complete set of orthonormal mode functions can be chosen  ... 
arXiv:1002.3059v2 fatcat:ly6346dbkfd4pcul5kjx4sao6y

Quantum Electrodynamics of One-Photon Wave Packets [chapter]

M. Stobińska, G. Alber, G. Leuchs
2010 Advances in Quantum Chemistry  
If we consider an electromagnetic field in a cubic quantization volume of length L and volume V = L 3 and impose periodic boundary conditions a complete set of orthonormal mode functions can be chosen  ...  In the continuum limit of a large quantization volume V the summation over the modes of the electromagnetic field can be approximated by k∈I, i −→ i V (2π ) 3 k∈I d 3 k = i ω∈I dωρ(ω), (17) with ρ(ω) =  ... 
doi:10.1016/s0065-3276(10)60008-1 fatcat:ipcamppovravvktkr637joji5q

Comparison of Octahedral and Spherical Nanoparticles for Plasmonics

Simeon Trendafilov, Monica Allen, Jeffery Allen, Zhiqun Lin
2019 IEEE Photonics Journal  
Through numerical simulations we have investigated possibilities for using octahedral instead of spherical Au nanoparticles in plasmonics.  ...  Our results show that the dimers of octahedral Au nanoparticles can provide higher field enhancement compared to spherical nanoparticles and that placing the octahedrons close to a metal plate can also  ...  Electric field norm is averaged over a small volume around the dimer gap with averaging volumes shown in upper left corner insets.  ... 
doi:10.1109/jphot.2019.2919226 fatcat:vb2ziwa3czfajprnuvsxxdsvme

Optimization of the deposited power distribution inside a layered lossy medium irradiated by a coupled system of concentrically placed waveguide applicators

K.S. Nikita, N.G. Maratos, N.K. Uzunoglu
1998 IEEE Transactions on Biomedical Engineering  
A rigorous electromagnetic model of the heated tissue, which takes into account coupling phenomena between system elements, is used for predicting the electric field at any point inside tissue.  ...  A method is proposed for controlling the deposited power distribution in a layered cylindrical lossy model, irradiated by a phased-array hyperthermia system consisting of four waveguide applicators.  ...  Optimal excitations are: . 4 and 5, the possibility of treating a spherical region centered at point (cm) with a 3-cm diameter, is examined.  ... 
doi:10.1109/10.686799 pmid:9644900 fatcat:6guayvbi6zecjcfhmelrdynrfi

Surface Currents on a Conducting Sphere Excited by a Dipole

C. H. Papas, Ronold King
1948 Journal of Applied Physics  
This field induces surface currents which, in turn, set up an electromagnetic field.  ...  entire field in empty space and its boundary Sv on the sphere has the components E2T!  ...  along the antenna, i.e., fJ=O, and since P n (1)=l, the Legendre polynomials appearing in (Cll) equal unity: Explicitly, the integration yields With (C8) the right-hand side of (C3) becomes: f" E 28 Eo  ... 
doi:10.1063/1.1698212 fatcat:impaceymhvdlpc5w7xaihohsi4

Analytical and numerical solution of the eddy-current problem in spherical coordinates based on the second-order vector potential formulation

T.P. Theodoulidis, N.V. Kantartzis, T.D. Tsiboukis, E.E. Kriezis
1997 IEEE transactions on magnetics  
Since the vector field equation is not separable in the spherical coordinate system, the second-order vector potential (SOVP) formulation is used to treat the problem by reducing it to the solution of  ...  The three-dimensional (3-D) eddy-current problem, described in spherical coordinates, is studied both analytically and numerically.  ...  His research interests are focused on computational electromagnetics with applications on nondestructive testing and signal processing of eddy-current testing data. Mr.  ... 
doi:10.1109/20.595899 fatcat:e4mis2z57veajnbwasbeutrzea

Solution of electromagnetic scattering problems using an eigenmode projection technique

Mamdouh H. Nasr, Islam A. Eshrah, Tamer M. Abuelfadl
2013 2013 IEEE Antennas and Propagation Society International Symposium (APSURSI)  
The fictitious cavity surface is regarded as a port excited by the uniform plane wave, and the total cavity fields and the port fields are then matched on the surface resulting in the field coefficients  ...  A fictitious canonical cavity is chosen to enclose the scatterer, and the fields are expanded in terms of the cavity solenoidal and irrotational eigenmodes.  ...  ) = p a scat p D p (r), with D p (r) being the functional dependence of the scattered fields from cylindrical or spherical objects in case of 2D or 3D problems, respectively [2] .  ... 
doi:10.1109/aps.2013.6711316 fatcat:yypcwmqcmzeqxpdu7pjrdbfd2i

Analytical Field and Torque Analysis of a Reaction Sphere

Linyu Zhu, Jian Guo, Eberhard Gill
2018 IEEE transactions on magnetics  
In this paper, an improved analytical model for dynamic fields excited by slotless distributed windings is presented for the first time.  ...  Torque calculations based on the analytical field models deviate from those based on the numerical model slightly, with the maximum error within 4%.  ...  Time-Harmonic Field Excited by Stator Currents Here, we focus on the dynamic field with components of e j ωt and e − j ωt .  ... 
doi:10.1109/tmag.2018.2871386 fatcat:jzjhf3nxr5abndjoy2t5cp5f5i

Theoretical study of single molecule fluorescence in a metallic nanocavity

Jörg Enderlein
2002 Applied Physics Letters  
Moreover, the metal shell enhances the exciting electric field intensity leading to an increase in fluorescence brightness by more than one order of magnitude.  ...  , for favorable values of bead radius and metal layer thickness, photostability of the molecule is improved significantly, due to a dramatic decrease of the fluorescence lifetime caused by the strong electromagnetic  ...  Fluorescence is excited by a plane electromagnetic wave incident onto the bead with its electric field amplitude vector parallel to the molecule's dipole axis.  ... 
doi:10.1063/1.1434314 fatcat:oztmf3kq45gpdhy4qzhuhf6ri4

Nonradiating and radiating modes excited by quantum emitters in open epsilon-near-zero cavities [article]

Iñigo Liberal, Nader Engheta
2015 arXiv   pre-print
However, wealthier responses might be attainable with cavities carved in more exotic materials.  ...  These phenomena provide unprecedented degrees of freedom in controlling and trapping fields within optical cavities, as well as in the design of cavity opto- and acousto-mechanical systems.  ...  fields on a volume prescribed on demand by the geometry of the cavity.  ... 
arXiv:1512.01092v1 fatcat:77g6rowgd5d4xkcswtqss3yvme
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