Hamburg 2001 – scientific programme
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HL: Halbleiterphysik
HL 16: Quantenpunkte und -dr
ähte: Optische Eigenschaften I
HL 16.4: Talk
Tuesday, March 27, 2001, 11:15–11:30, S2
Trion luminescence from a semiconductor nanoring — •R.A. Römer1 and M.E. Raikh2 — 1Institut für Physik, Technische Universität, D-09107 Chemnitz — 2Department of Physics, University of Utah, Salt Lake City, UT 84112, U.S.A.
Recent experiments on InAs/GaAs ring-like quantum dots [1], in addition to the conventional exciton luminescence, have revealed also recombination within complexes consisting of more than two particles. The simplest complex of this kind is a trion [2], which is a bound state of of two electrons and a hole. Motivated by these experiments, we study theoretically the binding energy of a trion on a ring and the sensitivity of this energy to the magnetic flux threading the ring. We find that the spin configuration of electrons within a trion determines the spatial structure of the trion, and, correspondingly, the emission spectrum.
[1] R. J. Warburton et al., Nature 405, 926 (2000).
[2] A. Chaplik and A. O. Govorov, Physica B 256/258, 477 (1998).