Theory of luminescence from highly excited self-assembled quantum dots

✍ Scribed by Arkadiusz Wójs; Pawel Hawrylak; Simon Fafard; Lucjan Jacak

• Book ID: 104429164
• Publisher: Elsevier Science
• Year: 1998
• Tongue: English
• Weight: 99 KB
• Volume: 2
• Category: Article
• ISSN: 1386-9477
• DOI: 10.1016/s1386-9477(98)00123-4

✦ Synopsis

The magneto-luminescence from lens-shaped self-assembled quantum dots, containing either many excitons or many electrons is studied. The single-electron and hole energy levels are shown to form degenerate shells in the absence of a magnetic ÿeld. In the case of many-exciton dots, the hidden symmetries associated with these degeneracies are responsible for a remarkable dependence of the absorption=emission spectrum on the number of excitons. In the case of many-electron dots, the degeneracies lead to the Hund-like oscillation of the total spin as a function of the number of electrons, which can be probed by photoluminescence. The symmetry-breaking e ect of a magnetic ÿeld is also demonstrated.