Abstract
We have studied wide quantum-well-wire structures by polarization-dependent photoluminescence and photoluminescence excitation spectroscopy. We observe an up-to-threefold splitting of the lowest heavy-hole-excition resonance, which arises from a quantization of the excitonic center-of-mass motion perpendicular to the direction of the wires. The energy separation between these transitions depends on the active wire width , which is significantly smaller than the geometrical wire width. Identifying the exciton wave vector with nπ/, we can reconstruct the exciton dispersion and find excellent agreement with theory if we use the k=0 heavy-hole mass.
- Received 25 July 1991
DOI:https://doi.org/10.1103/PhysRevB.44.6550
©1991 American Physical Society