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Excitations in Organic Solids$
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Vladimir Agranovich

Print publication date: 2008

Print ISBN-13: 9780199234417

Published to Oxford Scholarship Online: January 2009

DOI: 10.1093/acprof:oso/9780199234417.001.0001

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Surface Excitons

Surface Excitons

Chapter:
(p.325) 12 SURFACE EXCITONS
Source:
Excitations in Organic Solids
Author(s):

Vladimir M. Agranovich

Publisher:
Oxford University Press
DOI:10.1093/acprof:oso/9780199234417.003.0012

This chapter discusses the properties of surface excitons and polaritons. It presents a discussion of surface polaritons at the sharp interface between media, the observation of exciton surface polaritons at room temperature, the surface excitons in the presence of a transition layer, and nonlinear surface polaritons. The two-dimensional site shift surface excitons in outermost monolayers of molecular crystals and their properties are also considered. It is shown that in quasi-one dimensional crystals with molecules having the strong mixing of Frenkel- and CT exciton states at the edge of even perfect chain exciton states can be formed localized at edge analogous to Tamm states in perfect semiconductors.

Keywords:   charge-transfer excitons, Coulomb excitons, Frenkel excitons, site shift surface excitons, edge local states, surface polaritons, Tamm states

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