Angular Spectrum Representation of Scattered Electromagnetic Fields PDF Download
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Author: Ari T. Friberg
Publisher:
ISBN:
Category :
Languages : en
Pages : 9
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Book Description
Angular spectrum representation is derived for the electromagnetic field scattered from any linear, time-independent medium. In particular, the medium may be homogeneous or inhomogeneous, isotropic or anisotropic, spatially nondispersive or spatially dispersive, and it may be dielectric, magnetic, or magnetoelectric. The spectral amplitudes of the plane-wave modes of the scattered field are found to depend in a relatively simple manner on the induced polarization and on the induced magnetization. In the special case when the first Born approximation applies, the results take a particurly simple form and may be used to determine the scattered electromagnetic field vectors at any distance from the scatterer.
Author: Ari T. Friberg
Publisher:
ISBN:
Category :
Languages : en
Pages : 9
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Book Description
Angular spectrum representation is derived for the electromagnetic field scattered from any linear, time-independent medium. In particular, the medium may be homogeneous or inhomogeneous, isotropic or anisotropic, spatially nondispersive or spatially dispersive, and it may be dielectric, magnetic, or magnetoelectric. The spectral amplitudes of the plane-wave modes of the scattered field are found to depend in a relatively simple manner on the induced polarization and on the induced magnetization. In the special case when the first Born approximation applies, the results take a particurly simple form and may be used to determine the scattered electromagnetic field vectors at any distance from the scatterer.
Author: P. C. Clemmow
Publisher:
ISBN:
Category : Electromagnetic fields
Languages : en
Pages : 208
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Book Description
Author: Manuel Nieto Vesperinas
Publisher: World Scientific Publishing Company
ISBN: 9813106522
Category : Science
Languages : en
Pages : 455
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Book Description
This book presents a comprehensive tutorial on propagation, diffraction and scattering problems from the basic principles of physical optics. Beginning with the fundamental differential and integral equations for wavefields, the text presents an exhaustive discussion on the extinction theorem as a non-local boundary condition; this has been extensively employed for the rigorous solution of scattering and diffraction problems.There is also an in-depth presentation of the topic of scattering from rough surfaces, in particular the phenomenon of enhanced backscattering, as well as a detailed development of the angular spectrum representation of fields leading to questions on non-diffraction beams. Of key interest in near field optical microscopy and nanooptics, the S-matrix theory based on the angular spectrum for propagating components and the recently discovered properties of the S-matrix for evanescent components of wavefields are considered. In addition, the book deals with the healing effect of phase conjugation on waves, and focuses on some applications concerning the relationship with time reversal.Readers will also find discussions on image recovery from partial information data (phase problems and super-resolution problems), as well as a chapter on the fundamentals of near field optical microscopy techniques, including the hot topic of propagation in negative index media.
Author: John Arthur Marozas
Publisher:
ISBN:
Category : Dielectric relaxation
Languages : en
Pages : 468
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Book Description
Author: Zhisong Tong
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Book Description
This dissertation encompasses several studies relating to the theory of weak potential scattering of scalar and electromagnetic random, wide-sense statistically stationary fields from various types of deterministic or random linear media. The proposed theory is largely based on the first Born approximation for potential scattering and on the angular spectrum representation of fields. The main focus of the scalar counterpart of the theory is made on calculation of the second-order statistics of scattered light fields in cases when the scattering medium consists of several types of discrete particles with deterministic or random potentials. It is shown that the knowledge of the correlation properties for the particles of the same and different types, described with the newly introduced pair-scattering matrix, is crucial for determining the spectral and coherence states of the scattered radiation. The approach based on the pair-scattering matrix is then used for solving an inverse problem of determining the location of an "alien" particle within the scattering collection of "normal" particles, from several measurements of the spectral density of scattered light. Weak scalar scattering of light from a particulate medium in the presence of optical turbulence existing between the scattering centers is then approached using the combination of the Born's theory for treating the light interaction with discrete particles and the Rytov's theory for light propagation in extended turbulent medium. It is demonstrated how the statistics of scattered radiation depend on scattering potentials of particles and the power spectra of the refractive index fluctuations of turbulence. This theory is of utmost importance for applications involving atmospheric and oceanic light transmission. The second part of the dissertation includes the theoretical procedure developed for predicting the second-order statistics of the electromagnetic random fields, such as polarization and linear momentum, scattered from static media. The spatial distribution of these properties of scattered fields is shown to be substantially dependent on the correlation and polarization properties of incident fields and on the statistics of the refractive index distribution within the scatterers. Further, an example is considered which illustrates the usefulness of the electromagnetic scattering theory of random fields in the case when the scattering medium is a thin bio-tissue layer with the prescribed power spectrum of the refractive index fluctuations. The polarization state of the scattered light is shown to be influenced by correlation and polarization states of the illumination as well as by the particle size distribution of the tissue slice.
Author: F. G. Bass
Publisher: Elsevier
ISBN: 1483187756
Category : Science
Languages : en
Pages : 541
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Book Description
Wave Scattering from Statistically Rough Surfaces discusses the complications in radio physics and hydro-acoustics in relation to wave transmission under settings seen in nature. Some of the topics that are covered include radar and sonar, the effect of variations in topographic relief or ocean waves on the transmission of radio and sound waves, the reproduction of radio waves from the lower layers of the ionosphere, and the oscillations of signals within the earth-ionosphere waveguide. The book begins with some fundamental idea of wave transmission theory and the theory of random processes as used to rough surfaces and to wave fields. This discussion is followed by an analysis of the average fields of sound and electromagnetic waves. A section on spatial correlation characteristics in the approximation of small perturbations is then given. Another chapter of the text explains the Kirchhoff method. The book will provide useful information to physicists, mechanical engineer, students, and researchers in the field of acoustics.
Author: J. S. Asvestas
Publisher:
ISBN:
Category : Electromagnetic waves
Languages : en
Pages : 756
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Book Description
The book represents an exhaustive study of the scattering properties of acoustically soft and hard bodies and of perfect conductors, presented for 15 geometrically-simple shapes. Such shapes are important in their own right and as a basis for synthesizing the radiation and scattering properties of more complex configurations. Each shape is treated in a separate chapter whose contents are presented in stylized format for easy reference. Emphasis is placed on results in the form of formulae and diagrams. Although no detailed derivation are included, an outline of methods in scattering theory is given in the Introduction. (Author).
Author: Jack Raymond Mentzer
Publisher:
ISBN:
Category : Electric waves
Languages : en
Pages : 154
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Book Description
Author: P. C. Clemmow
Publisher: Elsevier
ISBN: 1483149544
Category : Science
Languages : en
Pages : 194
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Book Description
The Plane Wave Spectrum Representation of Electromagnetic Fields presents the theory of the electromagnetic field with emphasis to the plane wave. This book explains how fundamental electromagnetic fields can be represented by the superstition of plane waves traveling in different directions. Organized into two parts encompassing eight chapters, this book starts with an overview of the methods whereby plane wave spectrum representation can be used in attacking different characteristic problems belonging to the theories of radiation, diffraction, and propagation. This book then discusses the concept of relative simplicity of plane wave solutions of Maxwell's equations whereby their use enables some of the significant elementary physical and engineering characteristics of the electromagnetic field to be clarified. Other chapters consider the concept of an infinitely thin screen that is absolutely absorbing. The final chapter deals with the complicated problems that occur when anisotropic media are involved. Mathematicians and physicists will find this book useful.
Author: V. V. Varadan
Publisher:
ISBN:
Category : Science
Languages : en
Pages : 380
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Book Description
This is the first volume in the Handbook on Acoustic, Electromagnetic and Elastic Wave Scattering subseries and it serves as an introduction to the remaining volumes. The basic objective of this series is to serve as a major reference source for the uniform treatment of acoustic, electromagnetic and elastodynamic field problems. It provides an indispensable guide for the scientific community and graduate students by acquainting them very quickly with the basic principles of a certain technique as it is applied to any of the three fields, and also provides appropriate references. It was felt that in presenting such a comprehensive collection of treatment methods as they are applied to all three wave fields it would open up a whole range of new ideas to solid mechanists, who would perhaps otherwise not come into contact with such electromagnetic waves literature. These three subseries of volumes will prove a useful aid to researchers in reading and understanding the jargon used in the literature on acoustic, electromagnetic and elastodynamic fields, as well as providing them with the opportunity for the cross-fertilization of ideas.
