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Electromagnetic Radiation$
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Richard R. Freeman, James A. King, and Gregory P. Lafyatis

Print publication date: 2019

Print ISBN-13: 9780198726500

Published to Oxford Scholarship Online: February 2019

DOI: 10.1093/oso/9780198726500.001.0001

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Radiation Fields in Constrained Environments

Radiation Fields in Constrained Environments

(p.523) 13 Radiation Fields in Constrained Environments
Electromagnetic Radiation

Richard Freeman

James King

Gregory Lafyatis

Oxford University Press

The vacuum field energies and their connection to the force between two plates are presented while deriving the Casimir force. Thermal radiation and the Planck spectrum are introduced and the Einstein A and B coefficients and their properties under thermodynamic equilibrium examined. Microwave cavities and wave guides are considered and their general properties derived with special consideration given to conducting waveguides and transmission lines. Optical waveguides are analyzed using the ray optic picture. Topics include planar waveguides, variable index circular waveguides, single mode fibers, and dispersion. Finally, photonic crystals are discussed and photonic band structures are shown to be analogous to electronic bands.

Keywords:   electromagnetic modes, Planck, Casimir force, Einstein A and B coefficients, thermodynamic equilibrium, microwave cavities, waveguides, transmission lines, optical waveguides, photonic crystals

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