| Autor: |
Oreszczuk, Kacper, Goryca, Mateusz, Pacuski, Wojciech, Smoleński, Tomasz, Nawrocki, Michał, Kossacki, Piotr |
| Rok vydání: |
2017 |
| Předmět: |
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| Zdroj: |
Phys. Rev. B 96, 205436 (2017) |
| Druh dokumentu: |
Working Paper |
| DOI: |
10.1103/PhysRevB.96.205436 |
| Popis: |
We present a detailed spectroscopic study of the photoluminescence quenching in an epitaxial structures containing CdSe/ZnSe quantum dots doped with low concentration of Mn$^{2+}$ ions. Our time-resolved and time-integrated experiments reveal the origin of the quenching observed in macro-photoluminescence studies of ensembles of such dots. We show that incorporation of even a few ions to an individual dot does not quench its luminescence effectively, although some fingerprints of expected spin-dependent quenching are visible. At the same time, the presence of Mn$^{2+}$ ions in the sample significantly affects the luminescence intensity of the wetting layer, resulting in a quenching of the global luminescence from studied structure. On the other hand, the luminescence decay dynamics is found to be independent of the presence of Mn$^{2+}$ ions, which suggests that the observed quenching occurs for the excited excitonic states. |
| Databáze: |
arXiv |
| Externí odkaz: |
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