Abstract
We report on optical spectroscopy of self-assembled InAs quantum dots in a magnetic field. We describe how we measure the emission characteristics of a single quantum dot (QD) in high magnetic fields at low temperature using a miniature, fiber-based confocal microscope. Example results are presented on a QD whose charge can be controlled using a field-effect device. For the uncharged, singly and doubly charged excitons we find a diamagnetism and the spin Zeeman effect. In contrast, for the triply-charged exciton we find a fundamentally different behavior. Anti-crossings in magnetic field imply that confined states of the QD are hybridized with Landau-like levels associated with the two-dimensional continuum. © 2003 Elsevier B.V. All rights reserved.
Original language | English |
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Pages (from-to) | 184-188 |
Number of pages | 5 |
Journal | Physica E: Low-Dimensional Systems and Nanostructures |
Volume | 21 |
Issue number | 2-4 |
DOIs | |
Publication status | Published - Mar 2004 |
Event | Proceedings of the Eleventh International Conference on Modulation (MSS11) - Nara, Japan Duration: 14 Jul 2003 → 18 Jul 2003 |
Keywords
- Magnetic properties
- Photoluminescence
- Quantum dot
- Spectroscopy