TUTCRIS - Tampereen teknillinen yliopisto

TUTCRIS

Linear and nonlinear optical properties of small silicon clusters

Tutkimustuotosvertaisarvioitu

Yksityiskohdat

AlkuperäiskieliEnglanti
Sivut7427-7438
Sivumäärä12
JulkaisuJournal of Chemical Physics
Vuosikerta93
Numero10
DOI - pysyväislinkit
TilaJulkaistu - 1990
Julkaistu ulkoisestiKyllä
OKM-julkaisutyyppiA1 Alkuperäisartikkeli

Tiivistelmä

Electronic contributions to the optical properties of small silicon clusters are examined. Geometries and the electronic structures of the clusters are established using the tight-binding model, and linear as well as nonlinear polarizabilities of the clusters are evaluated using one-electron density matrix techniques. Kleinman's conjecture for hyperpolarizabilities is shown to be violated in the frequency-degenerate case, which is of practical importance. The nonlinear polarizabilities are found to depend primarily on the symmetry of the cluster and prove to be high for the low-symmetry clusters. Possible experiments and applications are discussed.

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