We report on the experimental observation of excitonic molecules (biexcitons) in high-quality V-shaped quantum wires. By means of spatially resolved near-field photoluminescence spectroscopy, first we unambiguously isolate excitons with a one-dimensional character, and secondly we present the optical transition from 1D biexciton to 1D exciton as a function of excitation power density. The density of these biexcitonic molecules is shown to increase superlinearly compared to the linear variation of exciton density.
Title
Probing excitonic nonlinearities in quantum wires
Published in
Physica Status Solidi B-Basic Research
Volume
221
Issue
1
Pages
277-280
Date
2000
ISSN
0370-1972
Note
Swiss Fed Inst Technol, Dept Phys, CH-1015 Lausanne, Switzerland. Electrotech Lab, Tsukuba, Ibaraki 305, Japan. Japan Sci & Technol Corp, Tsukuba, Ibaraki 305, Japan. Crottini, A, Swiss Fed Inst Technol, Dept Phys, CH-1015 Lausanne, Switzerland.
ISI Document Delivery No.: 362PZ
Cited Reference Count: 11
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Record creation date
2007-08-31