Enhanced Binding Energy of One-Dimensional Excitons in Quantum Wires

T. Someya; H. Akiyama; H. Sakaki

doi:10.1103/PhysRevLett.76.2965

Enhanced Binding Energy of One-Dimensional Excitons in Quantum Wires

T. Someya, H. Akiyama, and H. Sakaki

Phys. Rev. Lett. 76, 2965 – Published 15 April 1996

Abstract

Photoluminescence spectra are systematically studied on a series of 5 nm scale, T-shaped, GaAs quantum wires (QWRs). Potential profiles and quantized energies of QWRs are precisely determined as a function of structure parameters. By comparing the experimental quantized energy with the calculation without the Coulomb interaction, the binding energy $E_{b}$ of one-dimensional (1D) excitons is quantitatively evaluated. Upon increasing the 1D confinement, $E_{b}$ in QWRs is found to be enhanced to $27 \pm 3 meV$ , which is 6–7 times larger than the bulk value.

Received 25 October 1995

DOI:https://doi.org/10.1103/PhysRevLett.76.2965

Authors & Affiliations

T. Someya¹, H. Akiyama^1,2, and H. Sakaki¹

¹Research Center for Advanced Science and Technology, University of Tokyo and Quantum Transition Project, Research Development Corporation of Japan, 4-6-1 Komaba, Meguro-ku, Tokyo, Japan
²PRESTO, Research Development Corporation of Japan, Honcho 2-45-13, Nakano-ku, Tokyo, Japan