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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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PRINTED FROM OXFORD SCHOLARSHIP ONLINE (oxford.universitypressscholarship.com). (c) Copyright Oxford University Press, 2021. All Rights Reserved. An individual user may print out a PDF of a single chapter of a monograph in OSO for personal use. date: 28 November 2021

Atom-Light Forces

Atom-Light Forces

(p.301) 11 Atom-Light Forces
Light-Matter Interaction

John Weiner

Frederico Nunes

Oxford University Press

Chapter 11 presents the simplest and most intuitive approach to atom-optical interactions: the atom is modelled as a damped harmonic oscillator with spontaneous emission as the damping agent. The semiclassical viewpoint, in which the atom is treated as a quantum object but the fields are classical, is adopted throughout the chapter. Next, the two-level atom is introduced, which sets the stage for establishing light forces at the atomic level: the dipole-gradient force and the radiation pressure force. The Einstein B coefficient is revisited as stimulated dipole emission. Finally, the optical Bloch equations are used to reformulate more generally the appearance of optical forces and to describe the existence of atom Doppler cooling.

Keywords:   two-level atom, semiclassical viewpoint, dipole matrix element, dipole-gradient force, radiation pressure force, spontaneous emission, Doppler cooling, optical Bloch equations

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