We study the electronic structure and the optical properties of germanium clusters up to about 10(3) atoms, by using a semi-empirical tight-binding approach. Germanium nanocrystals are related to quantum dots growing, by a self-organization process, in sapphire matrices. The optical properties of such dots are experimentally found to be strongly influenced by quantum confinement effects.. We investigate these effects from the theoretical point of view, calculating the optical spectra in the single-particle approximation. Inclusion of the electron-hole interaction is found to yield visible effects.

Optical properties of germanium nanocrystals / M. Palummo, G. Onida, R. Del Sole. - In: PHYSICA STATUS SOLIDI. A, APPLIED RESEARCH. - ISSN 0031-8965. - 175:1(1999), pp. 23-31.

Optical properties of germanium nanocrystals

G. Onida
Secondo
;
1999

Abstract

We study the electronic structure and the optical properties of germanium clusters up to about 10(3) atoms, by using a semi-empirical tight-binding approach. Germanium nanocrystals are related to quantum dots growing, by a self-organization process, in sapphire matrices. The optical properties of such dots are experimentally found to be strongly influenced by quantum confinement effects.. We investigate these effects from the theoretical point of view, calculating the optical spectra in the single-particle approximation. Inclusion of the electron-hole interaction is found to yield visible effects.
Settore FIS/03 - Fisica della Materia
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2434/186597
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