Spectroscopy of Few-Electron Collective Excitations in Charge-Tunable Artificial Atoms

DOI to cite this document:: 10.5283/epub.9492

Brocke, T. ; Bootsmann, M.-T. ; Tews, M. ; Wunsch, B. ; Pfannkuche, D. ; Heyn, Ch. ; Hansen, W. ; Heitmann, Detlef ; Schüller, Christian

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Date of publication of this fulltext: 21 Sep 2009 07:12

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Abstract

We report the investigation of electronic excitations in InGaAs self-assembled quantum dots using resonant inelastic light scattering. The dots can be charged via a gate by N = 1,[ellipsis (horizontal)],6 electrons. We observe excitations, which are identified as transitions of electrons, predominantly from the s to the p shell (s–p transitions) of the quasiatoms. We find that the s–p transition ...