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4 - Electron–Photon Interaction

Published online by Cambridge University Press:  10 November 2022

Mauro Nisoli
Mauro Nisoli
Affiliation:
Politecnico di Milano
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Summary

Basic concepts of electromagnetic theory; Coulomb gauge; intensity of electromagnetic field. Electrons in an electromagnetic field: from the Lagrangian to the Hamiltonian; canonical momentum. Interaction Hamiltonian. Semiclassical approximation; weak-field limit. Electric dipole approximation. Calculation of the optical susceptibility by using the density matrix approach. From optical susceptibility to absorption coefficient. Momentum of an electron in a periodic crystal.

Keywords

PhotonElectrons in electromagnetic fieldsInteraction HamiltonianSemiclassical approximationDipole approximationOptical susceptibility
Type
Chapter
Information
Semiconductor Laser Photonics , pp. 98 - 115
Publisher: Cambridge University Press
Print publication year: 2022

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