Abstract
In monolayers of transition metal dichalcogenides the nonlocal nature of the effective dielectric screening leads to large binding energies of excitons. Additional lateral confinement gives rise to exciton localization in quantum dots. By assuming parabolic confinement for both the electron and the hole, we derive model wave functions for the relative and the center-of-mass motions of electronhole pairs, and investigate theoretically resonant energy transfer among excitons localized in two neighboring quantum dots. We quantify the probability of energy transfer for a direct- gap transition by assuming that the interaction between two quantum dots is described by a Coulomb potential, which allows us to include all relevant multipole terms of the interaction. We demonstrate the structural control of the valley-selective energy transfer between quantum dots.
Dokumententyp: | Zeitschriftenartikel |
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Fakultät: | Physik |
Fakultätsübergreifende Einrichtungen: | Center for NanoScience (CENS) |
Themengebiete: | 500 Naturwissenschaften und Mathematik > 530 Physik
500 Naturwissenschaften und Mathematik > 500 Naturwissenschaften |
URN: | urn:nbn:de:bvb:19-epub-89095-5 |
ISSN: | 2045-2322 |
Sprache: | Englisch |
Dokumenten ID: | 89095 |
Datum der Veröffentlichung auf Open Access LMU: | 25. Jan. 2022, 09:28 |
Letzte Änderungen: | 27. Jan. 2022, 08:27 |