Optical Spectroscopy of Quantum Dots in High Magnetic Fields |
| A. Babiński
Institute of Experimental Physics, Warsaw University, Hoża 69, 00-681 Warszawa, Poland |
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| Received: 17 06 2006; |
| Optical spectroscopy measurements of single InAs/GaAs self-assembled quantum dots have been performed. The multiexcitonic emission from the s-, p-, and d-shells of a single dot is observed and investigated in magnetic field up to 28 T. The Zeeman splitting of the s-shell excitons has been found to depend on the dot morphology. While the energy-splitting in flat (2 nm height) dots linearly increases with magnetic field, its significant non-linearity is observed for larger in size, tall (4 nm height) dots. The effect of magnetic field on the orbital motion of carriers in dots has also been investigated. It has been found that the modified Fock-Darwin pattern explains the observed evolution of the emission from highly-excited single tall quantum dot. |
| DOI: 10.12693/APhysPolA.110.275 PACS numbers: 78.67.Hc, 78.55.Cr, 75.75.+a |