One-dimensional biexcitons in a single quantum wire
We report the direct observation of one-dimensional (ID) excitonic molecules (biexcitons) in high quality disorder free semiconductor quantum wires. By means of spatially resolved near-field photoluminescence spectroscopy, we detected delocalized 1D excitons through the spatial extension of their homogeneous emission. 1D biexciton transitions are evidenced by their correlation to the 1D excitons as well as their power dependence. The photoluminescence intensity from biexcitons is shown to increase quadratically compared to the linear variation for excitonic emission, in agreement with the mass action law. The biexciton binding energy is measured to be 1.2 meV, and the lineshape is clearly asymmetric, showing the expected low energy tail. (C) 2002 Elsevier Science Ltd. All rights reserved.
WOS:000174760800001
2002
121
8
401
405
Swiss Fed Inst Technol, Dept Phys, CH-1015 Lausanne, Switzerland. JST, Crest Sci & Technol Corp, Electrotech Lab, Tsukuba, Ibaraki 305, Japan. Deveaud, B, Swiss Fed Inst Technol, Dept Phys, CH-1015 Lausanne, Switzerland.
ISI Document Delivery No.: 537LY
Cited Reference Count: 35
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