Optical studies of localized excitons in symmetric coupled quantum wells
| Autor: | A. M. Fox, J.S. Roberts, Robin J. Nicholas, J.G. Michels, R. J. Stone, D. Kinder, C. C. Chang |
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| Rok vydání: | 2016 |
| Předmět: |
Physics
Photoluminescence Absorption spectroscopy Condensed Matter::Other Exciton Physics::Optics Photon energy Condensed Matter::Mesoscopic Systems and Quantum Hall Effect Condensed Matter Physics Condensed Matter::Materials Science Coupling (physics) Far infrared Monolayer General Materials Science Electrical and Electronic Engineering Atomic physics Quantum well |
| Zdroj: | ResearcherID Scopus-Elsevier |
| Popis: | We present evidence for coupling between spatially separated excitonic states in a GaAs symmetric coupled quantum well. A split excitonic peak is observed in the photoluminescence spectrum of our sample and is identified as due to islands of monolayer fluctuation in the well width. We use the technique of far-infrared modulated photoluminescence to show that a resonant coupling exists between the excitonic states when the incident far-infrared photon energy is approximately equal to the splitting as measured in the photoluminescence spectrum. The most likely mechanism for this coupling is the dipole–dipole interaction. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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