Multi-exciton spectroscopy on a self-assembled InGaAs/GaAs quantum dot

F. Findeis, A. Zrenner, M. Markmann, G. Böhm, G. Abstreiter

Research output: Contribution to journalConference articlepeer-review

2 Scopus citations


We report about spatially resolved magneto-optical experiments on a self-assembled InGaAs quantum dot. Using electron beam lithograpy for patterning a metal shadow mask we can isolate a single dot. This allows us to study the optical response of a single dot as a function of excitation power and magnetic field. We investigate the influence of many body interaction in the emission spectra for different exciton occupation numbers of the dot. The diamagnetic/orbital shift as well as Zeeman splitting in a magnetic field can be fully resolved and are used to identify the observed emission lines. Further we report on absorption properties of the quantum dot as a function of magnetic field. We analyze in detail the phonon-assisted absorption process connected with the GaAs LO-phonon 36 meV above the single-exciton ground state.

Original languageEnglish
Pages (from-to)354-358
Number of pages5
JournalPhysica E: Low-Dimensional Systems and Nanostructures
Issue number3
StatePublished - May 2000
EventMSS9: The 9th International Conference on Modulated Semiconductor Structures - Fukuoka, Jpn
Duration: 12 Jul 199916 Jul 1999


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