Abstract
The optical properties of epitaxially grown nanostructures with nominal CdSe coverage between 0.15 monolayer (ML) and 0.58 ML are investigated by photoluminescence (PL) and PL excitation spectroscopy at low and high excitation density, time-resolved PL, temperature dependent linewidth analysis, and two-photon excitation spectroscopy. We discuss exciton-phonon complexes in a potential and analyze their dominant dimensionality. The exciton-polaron picture, which is mostly applied to the extreme case of very strong exciton-phonon coupling, is introduced here as a well-suited description of the optical properties of ultra-small semiconductor nanostructures with relaxed quantum confinement.
2 More- Received 26 May 2004
DOI:https://doi.org/10.1103/PhysRevB.70.195304
©2004 American Physical Society