Fausto Rossi et al 1999 J. Phys.: Condens. Matter 11 5969 doi:10.1088/0953-8984/11/31/306
Theory of excitonic confinement in semiconductor quantum wires
Fausto Rossi
,
,§, Guido Goldoni,, Oskar Mauritz, and Elisa Molinari,
We review our theoretical approach to the optical response of low-dimensional semiconductor structures. The method is based on the density-matrix formalism and can treat low-density (excitonic) and high-density (gain) regimes on the same footing while retaining the full complexity of realistic nanostructures. We discuss in particular its generalization for studying the combined effects of dielectric and quantum confinement, as well as novel developments aimed at the analysis of local absorption spectra.
We examine the main effects of electron-hole Coulomb correlation on the optical spectra of semiconductor quantum wires, where it determines the suppression of band-edge singularities and the peculiar scaling properties of excitonic binding and non-linearities. On the basis of our recent results on different types of nanostructure, we present a critical discussion of possible strategies for tailoring electron-hole Coulomb interaction, and predicting its influence on near-field spectra.
- PACS
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68.65.La Quantum wires (patterned in quantum wells)
71.35.Ee Electron-hole drops and electron-hole plasma
71.45.Gm Exchange, correlation, dielectric and magnetic response functions, plasmons
- Subjects
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Condensed matter: electrical, magnetic and optical
- Dates
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Issue 31 (9 August 1999)
Received 4 February 1999
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Theory of excitonic confinement in semiconductor quantum wires
Fausto Rossi et al 1999 J. Phys.: Condens. Matter 11 5969
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