Observation of excited (bi-)exciton and multi-exciton features in locally homogeneous quantum dots
| Autor: | JH Joachim Wolter, Jos E. M. Haverkort, T Twan van Lippen, Frank P.J de Groote, R Richard Nötzel |
|---|---|
| Přispěvatelé: | Photonics and Semiconductor Nanophysics |
| Jazyk: | angličtina |
| Rok vydání: | 2003 |
| Předmět: |
Physics
Length scale Condensed matter physics Phonon Condensed Matter::Other Exciton Condensed Matter Physics Condensed Matter::Mesoscopic Systems and Quantum Hall Effect Molecular physics Atomic and Molecular Physics and Optics Spectral line Electronic Optical and Magnetic Materials Condensed Matter::Materials Science Quantum dot Excited state Coulomb Biexciton |
| Zdroj: | Physica E: Low-Dimensional Systems & Nanostructures, 17(1-4), 26-30. Elsevier |
| ISSN: | 1386-9477 |
| Popis: | We investigate micro-photoluminescence spectra of arrays of locally homogeneous quantum dots (QDs). Our spectra indicate that the QDs exhibit excellent homogeneity in size on a length scale extending up to several microns. Using a Hartree–Fock based calculation including Coulomb and exchange energies, the observed spectra can be assigned to excitonic and multi-excitonic transitions, including excited exciton and excited bi-exciton transitions. We explain the strong excited-state recombinations due to the existence of a phonon bottleneck in our strain-free QD-arrays. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect