We calculate the optical properties of nitride-based quantum dots by taking into account quantum confinement as well as electron–hole interaction. We analyze model structures simulating In_xGa_{1−x}N dots in In_yGa_{1−y}N layers with different alloy compositions. We discuss the trends with the dot size and show that quantum confined excitations exist for a broad range of sizes down to the smallest observed dots. Our results allow us to identify the strong role of Coulomb correlations in the optical spectra and to predict a strong influence of photoexcitation power on selection rules in polarized samples. The signature of quantum confinement can be utilized for a critical interpretation of measured optical spectra.
Optical spectra of nitride quantum dots: Quantum confinement and electron-hole coupling / HOHENESTER U.; DI FELICE R.; MOLINARI E.; ROSSI F.. - In: APPLIED PHYSICS LETTERS. - ISSN 0003-6951. - 75:22(1999), pp. 3449-3451. [10.1063/1.125292]
Titolo: | Optical spectra of nitride quantum dots: Quantum confinement and electron-hole coupling | |
Autori: | ||
Data di pubblicazione: | 1999 | |
Rivista: | ||
Digital Object Identifier (DOI): | http://dx.doi.org/10.1063/1.125292 | |
Appare nelle tipologie: | 1.1 Articolo in rivista |
File in questo prodotto:
File | Descrizione | Tipologia | Licenza | |
---|---|---|---|---|
Hohenester-DIFelice-Rossi_APL_75_3449_1999.pdf | 2. Post-print / Author's Accepted Manuscript | PUBBLICO - Tutti i diritti riservati | Visibile a tuttiVisualizza/Apri |
http://hdl.handle.net/11583/1405215