Inducing normally forbidden transitions within the conduction band of GaAs quantum wells
| Autor: | Roger J. Malik, Janet L. Pan, J. F. Walker, Susan J. Walker, Lawrence C. West |
|---|---|
| Rok vydání: | 1990 |
| Předmět: |
Many-body problem
Physics and Astronomy (miscellaneous) Condensed matter physics Chemistry Many-body theory Electron Atomic physics Condensed Matter::Mesoscopic Systems and Quantum Hall Effect Absorption (electromagnetic radiation) Thermal conduction Electronic band structure Quantum well Envelope (waves) |
| Zdroj: | Applied Physics Letters. 57:366-368 |
| ISSN: | 1077-3118 0003-6951 |
| DOI: | 10.1063/1.103693 |
| Popis: | Recently, a new type of intersubband transition in GaAs quantum wells was observed by West and Eglash [1,2]. This transition differed from previous intersubband transitions [3] in that it had a direct, fully allowed, dipole between the envelope wavefunctions rather than the Bloch wavefunctions, was spectrally narrow, and temperature stable. This particular type of intersubband transition was termed a quantum well envelope subband (or state) transition “QWEST.” The Stark energy shift between the first and second conduction subbands in a GaAs quantum well was observed by Harwit and Harris [4]. Infrared detectors utilizing the QWEST have also been made [5] recently. |
| Databáze: | OpenAIRE |
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