| Zugriffsnummer | 12432 |
| Dokumenttyp | Zeitschriftenartikel |
| Sprache | Englisch |
| Titel | Quantization energy mapping of single V-groove GaAs quantum wires by femtosecond near-field optics |
| Autor(in); Institution |
Achermann, M.; Swiss Federal Institute of Technology Zurich, Institute of Quantum Electronics, Zurich, SWITZERLAND
Nechay, B. A.; Swiss Federal Institute of Technology Zurich, Institute of Quantum Electronics, Zurich, SWITZERLAND
Siegner, Uwe; 4.201, Femtosekunden-Messtechnik, PTB-Braunschweig
Hartmann, A.; Swiss Federal Institute of Technology Lausanne, Department of Physics, Lausanne, SWITZERLAND
Oberli, D.; Swiss Federal Institute of Technology Lausanne, Department of Physics, Lausanne, SWITZERLAND
Kapon, E.; Swiss Federal Institute of Technology Lausanne, Department of Physics, Lausanne, SWITZERLAND
Keller, U.; Swiss Federal Institute of Technology Zurich, Institute of Quantum Electronics, Zurich, SWITZERLAND
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| Quelle/Jahr | Applied Physics Letters: 76 (2000), 19, 2695 - 2697 |
| ISSN | 0003-6951 |
| Verlag | Melville, NY: AIP |
| Zusammenfassung | We demonstrate that femtosecond pump-probe spectroscopy in the optical near field is well suited to study the intrinsic properties of single V-groove GaAs quantum wires. Temporally and spatially resolved experiments show that the shape of near-field pump-probe traces sensitively depends on the detuning between the laser photon energy and the lowest exciton resonance of a quantum wire. This detuning dependence allows one to map the quantization energy fluctuations along a single quantum wire with 200 nm spatial resolution. We measure fluctuations of about 12 meV over 2 µm wire length, resulting from wire thickness variations of 1 ML. |
