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Local Optical Absorption by Confined Excitons in Single and Coupled Quantum Dots
Author(s) -
Simserides C.D.,
Hohenester U.,
Goldoni G.,
Molinari E.
Publication year - 2001
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/(sici)1521-3951(200104)224:3<745::aid-pssb745>3.0.co;2-9
Subject(s) - exciton , quantum dot , absorption (acoustics) , biexciton , electro absorption modulator , optoelectronics , physics , materials science , condensed matter physics , optics , quantum dot laser , quantum well , laser
We investigate optical near‐field spectra of single and coupled semiconductor quantum dots. An enhanced role for the Coulomb correlations is predicted, and it is shown that the spectra depend crucially on the spatial resolution of the “local” probe. The intensity of certain optical peaks as a function of the resolution exhibits an unexpected non‐monotonic behavior, which is identified as a fingerprint of Coulomb interactions in zero‐dimensional nanostructures.