Local Optical Spectroscopy in Quantum Confined Systems: A Theoretical Description

Details Local Optical Spectroscopy in Quantum Confined Systems: A Theoretical Description Local Optical Spectroscopy in Quantum Confined Systems: A Theoretical Description

1998-12-09

arxiv.org/abs/cond-mat/9812145v1

Physics

Condensed Matter

Materials Science

To appear in Phys. Rev. Lett. - 11 pages, 3 PostScript figures (1 figure in colors) embedded. Uses RevTex, and psfig styles

Scientific paper

10.1103/PhysRevLett.82.847

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 is derived within the density-matrix formalism including Coulomb correlation, 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.

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