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Coherent and Incoherent Contributions to Secondary Emission
Author(s) -
Thränhardt A.,
Kuckenburg S.,
Knorr A.,
Koch S.W.
Publication year - 2000
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/1521-3951(200009)221:1<227::aid-pssb227>3.0.co;2-u
Subject(s) - coherence (philosophical gambling strategy) , incoherent scatter , physics , phonon , photon , degree of coherence , exciton , quantum , scattering , secondary emission , signal (programming language) , coherent backscattering , condensed matter physics , computational physics , optics , quantum mechanics , electron , computer science , programming language
The coherent and incoherent contributions to the secondary emission of quantum well excitons are calculated microscopically including the combined influence of phonons, photons and structural disorder. Increasing disorder leads to an overall larger signal with shorter rise time. After its initial increase the coherence degree of the secondary emission gradually decays, and even when the initial signal is highly coherent, incoherent components dominate at later times. Since phonon and disorder scattering are closely interrelated, the full secondary emission does not separate into additive contributions from each of the mechanisms.