Abstract
Polarization-resolved photoluminescence excitation spectra of (Al, Ga)As serpentine superlattice quantum-wire arrays have been measured in magnetic fields up to 20 T. In the Faraday configuration we are able to resolve Landau-level-like magnetoexciton transitions in the low-field limit, and to directly determine the exciton binding energy. A maximum enhancement of excitonic binding by 70% is observed in a 160-Å-wide quantum wire array as compared to a two-dimensional reference, and the true superlattice character is evidenced by a decreased excitonic binding for a short period (54 Å wide) compared to a long period quantum-wire array (160 Å wide). © 1996 The American Physical Society.
- Received 3 November 1995
DOI:https://doi.org/10.1103/PhysRevB.53.6959
©1996 American Physical Society