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Excitons and Cooper PairsTwo Composite Bosons in Many-Body Physics$
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Monique Combescot and Shiue-Yuan Shiau

Print publication date: 2015

Print ISBN-13: 9780198753735

Published to Oxford Scholarship Online: March 2016

DOI: 10.1093/acprof:oso/9780198753735.001.0001

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(p.351) 15 Polaritons
Excitons and Cooper Pairs

Monique Combescot

Shiue-Yuan Shiau

Oxford University Press

Chapter 15 deals with exciton-polaritons. Starting from the polariton creation operator, a many-body formalism analogous to the one for excitons is constructed. In particular, the chapter identifies a novel photon-assisted exchange scattering that has similarity with the exchange interaction scattering existing for Frenkel excitons and for Cooper pairs. The chapter further discusses microscopic derivations of exciton-polaritons; these derivations depend on approximations that are made concerning photon-semiconductor interaction. The chapter also points out the intrinsic many-body nature of a “single” polariton for photons not close to photon-exciton resonance. Microcavity polaritons and the crucial role of photon confinement in the polariton dispersion relation are also discussed.

Keywords:   exciton-polariton, microcavity polariton, photon-assisted exchange scattering, many-body formalism, photon-semiconductor interaction, polariton dispersion relation

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