Abstract
A serpentine superlattice quantum-wire array avoids the tilt sensitivity of a tilted superlattice and promises significant 1D confinement at the 10 nm scale. Transmission electron micrographs confirm the intended geometry. Three independent polarization measurements, an energy shift, and the light-hole–heavy-hole splitting at 1.4 K, when compared with theory demonstrate 1D valence band states and 2D conduction band states. All five measurements are explained by lateral As wells and barriers of x=0.12 and 0.21, respectively, thus characterizing the step-flow growth.
- Received 7 February 1992
DOI:https://doi.org/10.1103/PhysRevLett.68.3464
©1992 American Physical Society