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Light-Matter InteractionPhysics and Engineering at the Nanoscale, Second Edition$
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John Weiner and Frederico Nunes

Print publication date: 2017

Print ISBN-13: 9780198796664

Published to Oxford Scholarship Online: March 2017

DOI: 10.1093/acprof:oso/9780198796664.001.0001

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Energy Flow in Polarisable Matter

Energy Flow in Polarisable Matter

(p.86) 4 Energy Flow in Polarisable Matter
Light-Matter Interaction

John Weiner

Frederico Nunes

Oxford University Press

Chapter 4 covers the time evolution of energy flux when electromagnetic waves propagate through media with electric polarisation. Analogies between the behaviour of classical fields in bulk matter with the energy dynamics of reactive and dissipative circuits are presented in some detail. It is shown how macroscopic electric polarisation and displacement fields can be related to microscopic atomic and molecular properties through the Clausius–Mossotti equation expressing the dielectric constant of a material in terms of the microscopic polarisability of the constituent atoms or molecules.

Keywords:   energy flux, polarisation, Clausius–Mossotti equation, reactive circuits, dissipative circuits

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