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AMPLITUDE EQUATIONS AND PATTERN FORMATION

Nasr M. Ghoniem and Daniel D. Walgraef

in Instabilities and Self-Organization in Materials: Volume I: Fundamentals of Nanoscience, Volume II: Applications in Materials Design and Nanotechnology

Published in print:
2008
Published Online:
May 2008
ISBN:
9780199298686
eISBN:
9780191720222
Item type:
chapter
Publisher:
Oxford University Press
DOI:
10.1093/acprof:oso/9780199298686.003.0009
Subject:
Physics, Condensed Matter Physics / Materials

This chapter begins with a discussion of reduced dynamics and amplitude equations. It then discusses the generic aspects of pattern selection and stability, the effect of external fields; group ... More


Albert Michelson and the Aether Wind

John C. H. Spence

in Lightspeed: The Ghostly Aether and the Race to Measure the Speed of Light

Published in print:
2019
Published Online:
October 2019
ISBN:
9780198841968
eISBN:
9780191878084
Item type:
chapter
Publisher:
Oxford University Press
DOI:
10.1093/oso/9780198841968.003.0007
Subject:
Physics, Atomic, Laser, and Optical Physics, History of Physics

The life of the gifted American scientist who devoted his life to detection of the Aether wind which the Earth should be moving through, and to the measurement of the speed of light. The struggle to ... More


Anisotropy

G. A. D. Briggs and O. V. Kolosov

in Acoustic Microscopy: Second Edition

Published in print:
2009
Published Online:
February 2010
ISBN:
9780199232734
eISBN:
9780191716355
Item type:
chapter
Publisher:
Oxford University Press
DOI:
10.1093/acprof:oso/9780199232734.003.0011
Subject:
Physics, Condensed Matter Physics / Materials

Polycrystalline materials give contrast from their grain structure in scanning acoustic micrographs. Bulk wave propagation in anisotropic materials can be calculated from the Christoffel equation. ... More


Fast and Slow Light

Guang S. He

in Nonlinear Optics and Photonics

Published in print:
2014
Published Online:
December 2014
ISBN:
9780198702764
eISBN:
9780191772368
Item type:
chapter
Publisher:
Oxford University Press
DOI:
10.1093/acprof:oso/9780198702764.003.0016
Subject:
Physics, Atomic, Laser, and Optical Physics

Fast or slow light propagation means that the group velocity of a quasi-monochromatic light pulse propagating in a resonant medium can be significantly faster or slower than the light speed in a ... More


Optical phenomena in the time domain

Charles S. Adams and Ifan G. Hughes

in Optics f2f: From Fourier to Fresnel

Published in print:
2018
Published Online:
January 2019
ISBN:
9780198786788
eISBN:
9780191828980
Item type:
chapter
Publisher:
Oxford University Press
DOI:
10.1093/oso/9780198786788.003.0007
Subject:
Physics, Atomic, Laser, and Optical Physics

This chapter discusses a sum of many waves with different frequencies, resulting in wave forms with particular time dependence. The propagation of the time-dependent wave solution through free space, ... More


Ray tracing in perfect crystals

ANDRÉ AUTHIER

in Dynamical Theory of X-Ray Diffraction

Published in print:
2003
Published Online:
January 2010
ISBN:
9780198528920
eISBN:
9780191713125
Item type:
chapter
Publisher:
Oxford University Press
DOI:
10.1093/acprof:oso/9780198528920.003.0012
Subject:
Physics, Atomic, Laser, and Optical Physics

This chapter describes the propagation of wavefields inside the crystal close to the Bragg angle. It shows that the direction of propagation of packets of wavefields as obtained by their group ... More


Acoustic waves I

Robert E. Newnham

in Properties of Materials: Anisotropy, Symmetry, Structure

Published in print:
2004
Published Online:
November 2020
ISBN:
9780198520757
eISBN:
9780191916601
Item type:
chapter
Publisher:
Oxford University Press
DOI:
10.1093/oso/9780198520757.003.0025
Subject:
Earth Sciences and Geography, Geochemistry

In this chapter we treat plane waves specified by a wave normal and a particle motion vector. Two types of waves, longitudinal waves and shear waves, are observed in solids. For low symmetry ... More


Traveling Waves in One Dimension

Mohammad Samiullah

in A First Course in Vibrations and Waves

Published in print:
2015
Published Online:
October 2015
ISBN:
9780198729785
eISBN:
9780191804113
Item type:
chapter
Publisher:
Oxford University Press
DOI:
10.1093/acprof:oso/9780198729785.003.0006
Subject:
Physics, Condensed Matter Physics / Materials

A study of traveling waves is presented for a wave traveling in a one-dimensional medium. The generation of a wave, the analytic expression of a traveling wave, the energy in a wave, and other basic ... More


Radiation in Materials

Richard Freeman, James King, and Gregory Lafyatis

in Electromagnetic Radiation

Published in print:
2019
Published Online:
February 2019
ISBN:
9780198726500
eISBN:
9780191793325
Item type:
chapter
Publisher:
Oxford University Press
DOI:
10.1093/oso/9780198726500.003.0009
Subject:
Physics, Atomic, Laser, and Optical Physics

The interaction of electromagnetic radiation and matter is examined, specifically electric and magnetic fields in materials with real and imaginary responses: under certain conditions the fields move ... More


Stokes’s Fundamental Contributions to Fluid Dynamics

Peter Lynch

in George Gabriel Stokes: Life, Science and Faith

Published in print:
2019
Published Online:
August 2019
ISBN:
9780198822868
eISBN:
9780191861321
Item type:
chapter
Publisher:
Oxford University Press
DOI:
10.1093/oso/9780198822868.003.0006
Subject:
Mathematics, History of Mathematics

George Gabriel Stokes made fundamental mathematical contributions to fluid dynamics that had profound practical consequences. The basic equations formulated by him play a central role in numerical ... More


Optical Temporal Solitons

Guang S. He

in Nonlinear Optics and Photonics

Published in print:
2014
Published Online:
December 2014
ISBN:
9780198702764
eISBN:
9780191772368
Item type:
chapter
Publisher:
Oxford University Press
DOI:
10.1093/acprof:oso/9780198702764.003.0012
Subject:
Physics, Atomic, Laser, and Optical Physics

In a n2 > 0 nonlinear medium (like an optical fiber) working in its negative group-velocity-dispersion (GVD) range, the GVD effect induced temporal broadening of an input short laser pulse can be ... More


Introduction

Helmut Rauch and Samuel A. Werner

in Neutron Interferometry 2nd Edn: Lessons in Experimental Quantum Mechanics, Wave-Particle Duality, and Entanglement

Published in print:
2015
Published Online:
March 2015
ISBN:
9780198712510
eISBN:
9780191780813
Item type:
chapter
Publisher:
Oxford University Press
DOI:
10.1093/acprof:oso/9780198712510.003.0001
Subject:
Physics, Atomic, Laser, and Optical Physics

Electromagnetic optical phenomena are generally understood via Maxwell’s equations for the electric and magnetic vector fields. Neutron optical phenomena are based upon de Broglie matter waves and ... More


Air-Coupled Ultrasonics

Dale Chimenti, Stanislav Rokhlin, and Peter Nagy

in Physical Ultrasonics of Composites

Published in print:
2011
Published Online:
November 2020
ISBN:
9780195079609
eISBN:
9780197560389
Item type:
chapter
Publisher:
Oxford University Press
DOI:
10.1093/oso/9780195079609.003.0013
Subject:
Chemistry, Industrial Chemistry

Ultrasonic material characterization or inspection for defects is conventionally performed using either liquid coupling (water, usually) or some type of gel or oil in contact-mode coupling. ... More


Electrons and holes in semiconductors

Geoffrey Brooker

in Essays in Physics: Thirty-two thoughtful essays on topics in undergraduate-level physics

Published in print:
2021
Published Online:
September 2021
ISBN:
9780198857242
eISBN:
9780191890284
Item type:
chapter
Publisher:
Oxford University Press
DOI:
10.1093/oso/9780198857242.003.0025
Subject:
Physics, Condensed Matter Physics / Materials, Theoretical, Computational, and Statistical Physics

“Electrons and holes in semiconductors” applies band theory to electrons in the conduction band, and to holes in the valence band. Holes are described by an upside-down Fermi–Dirac distribution. An ... More


Umklapp collisions and thermal conductivity

Geoffrey Brooker

in Essays in Physics: Thirty-two thoughtful essays on topics in undergraduate-level physics

Published in print:
2021
Published Online:
September 2021
ISBN:
9780198857242
eISBN:
9780191890284
Item type:
chapter
Publisher:
Oxford University Press
DOI:
10.1093/oso/9780198857242.003.0024
Subject:
Physics, Condensed Matter Physics / Materials, Theoretical, Computational, and Statistical Physics

“Umklapp collisions and thermal conductivity” deals with heat conduction in a dielectric solid. Collisions of phonons are divided into Umklapp and normal according as a reciprocal lattice vector is ... More


Quantum Cascade Lasers

Vurgaftman Igor

in Bands and Photons in III-V Semiconductor Quantum Structures

Published in print:
2020
Published Online:
January 2021
ISBN:
9780198767275
eISBN:
9780191821431
Item type:
chapter
Publisher:
Oxford University Press
DOI:
10.1093/oso/9780198767275.003.0013
Subject:
Physics, Particle Physics / Astrophysics / Cosmology

This chapter describes the most commonly used approaches for computing the band structure of active materials with intersubband optical transitions. The physics of quantum cascade lasers (QCLs) is ... More


Spectroscopy of Matter

Michael E. Thomas

in Optical Propagation in Linear Media: Atmospheric Gases and Particles, Solid State Components, and Water

Published in print:
2006
Published Online:
November 2020
ISBN:
9780195091618
eISBN:
9780197560679
Item type:
chapter
Publisher:
Oxford University Press
DOI:
10.1093/oso/9780195091618.003.0007
Subject:
Earth Sciences and Geography, Atmospheric Sciences

It is critical to understand the nature of the propagation medium in terms of the available resonances which couple to the electromagnetic field. The detailed specification of the complex index of ... More


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