Visible luminescence from semiconductor quantum dots in large ensembles
Abstract
Visible luminescence has been obtained from ensembles of defect-free, InxAl(1-x)As islands of ultrasmall dimensions embedded in AlyGa(1-y)As cladding layers. These structures were grown by molecular beam epitaxy and studied with low-temperature photoluminescence (PL) and transmission electron microscopy. Visible luminescence is produced using various compositions of InxAl(1-x)As/AlyGa(1-y)As. Quantum dot size distributions, planar densities, dot heights, and wetting layer thicknesses are presented and correlated with the PL spectra.
- Publication:
-
Applied Physics Letters
- Pub Date:
- July 1995
- DOI:
- 10.1063/1.115175
- Bibcode:
- 1995ApPhL..67..521L