Excitons in coupled InAs/InP self-assembled quantum wires

Details Excitons in coupled InAs/InP self-assembled quantum wires Excitons in coupled InAs/InP self-assembled quantum wires

2007-02-08

arxiv.org/abs/cond-mat/0702206v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

8 pages, 8 figures. To appear in Physical Review B

Scientific paper

Optical transitions in coupled InAs/InP self-assembled quantum wires are studied within the single-band effective mass approximation including effects due to strain. Both vertically and horizontally coupled quantum wires are investigated and the ground state, excited states and the photoluminescence peak energies are calculated. Where possible we compare with available photo-luminescence data from which it was possible to determine the height of the quantum wires. An anti-crossing of the energy of excited states is found for vertically coupled wires signaling a change of symmetry of the exciton wavefunction. This crossing is the signature of two different coupling regimes.

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