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Dynamical Density Matrix Theory of Multiphoton Transitions in Semiconductors
Author(s) -
Selbmann P. E.,
Dupertus M.A.,
Haacke S.,
Hessler T.,
Pleumeekers J. L.,
Deveaud B.
Publication year - 1998
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/(sici)1521-3951(199803)206:1<219::aid-pssb219>3.0.co;2-t
Subject(s) - diatomic molecule , physics , diagonal , density matrix , quantum mechanics , semiconductor , dipole , simple (philosophy) , matrix (chemical analysis) , basis (linear algebra) , discrete dipole approximation , electron , statistical physics , mathematics , quantum , chemistry , philosophy , geometry , epistemology , chromatography , molecule
Abstract A dynamical theory of multiphoton transitions in semiconductors is developed using a density matrix approach. It is shown that, in dipole approximation, these transitions require a mixed parity of the basis states and that band‐diagonal couplings of the electromagnetic field to Bloch electrons have to be included. The general theory is outlined using the simple, but solvable model of a diatomic tight‐binding chain. Possible extensions and applications of the approach are discussed.