Abstract
We report a partly variational calculation of biexcitonic states in a semiconductor quantum wire subjected to a magnetic field. The longitudinal component of the biexciton wave function is computed variationally, while the transverse component is obtained from exact numerical solution of the Schrödinger equation. We find that an external magnetic field squeezes the biexciton wave function, causing the binding energy to increase substantially. The increase is more pronounced in wider wires where the biexcitonic wave function is ‘‘softer’’ and hence more squeezable. This increase can enhance the already giant third-order nonlinear susceptibilities predicted for quantum wires, thus making these systems attractive for applications in nonlinear optics. © 1996 The American Physical Society.
- Received 26 April 1996
DOI:https://doi.org/10.1103/PhysRevB.54.5712
©1996 American Physical Society