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Characterization of quantization energy fluctuations in single quantum wires by femtosecond near-field optics

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8 Author(s)
Achermann, M. ; Inst. of Quantum Electron., Swiss Federal Inst. of Technol., Zurich, Switzerland ; Siegner, U. ; Nechay, B.A. ; Keller, U.
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Summary form only given. We present a novel method for the characterization of quantization energy fluctuations in single semiconductor quantum wires (QWRs). The method takes advantage of a recently developed femtosecond near-field scanning optical microscope (NSOM). We demonstrate that the shape of degenerate near-field pump-probe traces sensitively depends on the detuning between the laser photon energy and the lowest exciton resonance of a QWR. This dependence can be used to obtain information on the quantization energy fluctuations with 200 nm spatial resolution when scanning the NSOM tip along a QWR with a fixed laser photon energy.

Published in:

Quantum Electronics and Laser Science Conference, 2000. (QELS 2000). Technical Digest

Date of Conference:

12-12 May 2000