Abstract
Photoluminescence spectra are systematically studied at 4.2 K on a series of high-quality T-shaped edge quantum wires (QWRs) whose linewidths are as small as 4–7 meV. By measuring spectra in magnetic fields up to 12 T and comparing them with those of quantum wells (QWs), the effect of lateral confinement on exciton wave functions in QWRs is clearly and quantitatively demonstrated. It is found in QWRs formed by intersecting 5 nm thick GaAs QWs that the wave function of a one-dimensional (1D) exciton is squeezed far below the minimum size that has ever been realized by any 2D excitons in GaAs QWs.
- Received 29 December 1994
DOI:https://doi.org/10.1103/PhysRevLett.74.3664
©1995 American Physical Society