A theoretical description of local absorption is proposed in order to investigate spectral variations on a length scale comparable with the extension of the relevant quantum states. A general formulation, including Coulomb correlation, is derived within the density-matrix formalism and applied to the prototypical case of coupled quantum wires. The results show that excitonic effects may have a crucial impact on the local absorption, with implications for the spatial resolution and the interpretation of near-field optical spectra.
Local Optical Spectroscopy in Quantum Confined Systems: A Theoretical Description / Mauritz, O.; Goldoni, G.; Rossi, Fausto; Molinari, E.. - In: PHYSICAL REVIEW LETTERS. - ISSN 0031-9007. - 82:4(1999), pp. 847-850. [10.1103/PhysRevLett.82.847]
Local Optical Spectroscopy in Quantum Confined Systems: A Theoretical Description
ROSSI, FAUSTO;
1999
Abstract
A theoretical description of local absorption is proposed in order to investigate spectral variations on a length scale comparable with the extension of the relevant quantum states. A general formulation, including Coulomb correlation, is derived within the density-matrix formalism and applied to the prototypical case of coupled quantum wires. The results show that excitonic effects may have a crucial impact on the local absorption, with implications for the spatial resolution and the interpretation of near-field optical spectra.File | Dimensione | Formato | |
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https://hdl.handle.net/11583/1405207
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