| Autor: | D. W. E. Allsopp, A. Bhatnagar, R. Grey |
|---|---|
| Rok vydání: | 1999 |
| Předmět: |
Condensed Matter::Quantum Gases
Physics Condensed matter physics Condensed Matter::Other Photoconductivity Superlattice Electron Condensed Matter::Mesoscopic Systems and Quantum Hall Effect Atomic and Molecular Physics and Optics Electron localization function Electronic Optical and Magnetic Materials Blueshift Condensed Matter::Materials Science symbols.namesake Stark effect Electric field symbols Physics::Atomic Physics Electrical and Electronic Engineering Quantum well |
| Zdroj: | Optical and Quantum Electronics. 31:1189-1206 |
| ISSN: | 0306-8919 |
| DOI: | 10.1023/a:1007058925698 |
| Popis: | The Wannier–Stark effect has been investigated in strongly coupled three quantum well structures and 23.5 period superlattices consisting of 25 A wide GaAs wells separated by Al0.25Ga0.75As barriers of the same width. A blue shift associated with the Wannier–Stark localization of heavy holes states is observed for the first time, followed by a second blue shift at higher electric fields due to the electron localization. This is contrary to the widely reported single blue shift of the order of (Δe+Δhh)/2, where Δe and Δhh are the electron and heavy hole miniband widths respectively, produced by Wannier–Stark localization in superlattices. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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