Abstract
The exciton and biexciton ground-state binding energies are calculated for semiconductor quantum wires of radius R smaller than the bulk exciton radius assuming an infinite confining potential. Both the excitonic and biexcitonic (molecular) binding energies are enhanced by a factor greater than 5 for GaAs/As quantum wires of radius approximately /2. The simultaneous shrinking of the exciton size with the wire radius is shown to reduce the contribution (when compared with the quasi-two-dimensional case) of dielectric polarization effects which arise when the wire is embedded in a cladding with a lower dielectric constant.
- Received 2 April 1987
DOI:https://doi.org/10.1103/PhysRevB.36.6099
©1987 American Physical Society