Photoluminescence Spectroscopy of the Molecular Biexciton in Vertically Stacked Quantum Dot Pairs

Scheibner, M.; Ponomarev, I. V.; Stinaff, E. A.; Doty, M. F.; Bracker, A. S.; Hellberg, C. S.; Reinecke, T. L.; Gammon, D.

Photoluminescence Spectroscopy of the Molecular Biexciton in Vertically Stacked Quantum Dot Pairs

Authors

Description

We present photoluminescence studies of the molecular neutral biexciton-exciton spectra of individual vertically stacked InAs/GaAs quantum dot pairs. We tune either the hole or the electron levels of the two dots into tunneling resonances. The spectra are described well within a few-level, few-particle molecular model. Their properties can be modified broadly by an electric field and by structural design, which makes them highly attractive for controlling nonlinear optical properties.
4 pages, 5 figures, (v2, revision based on reviewers comments, published)