Signatures of single-photon interaction between two quantum dots located in different cavities of a weakly coupled double microdisk structure

We report on the radiative interaction of two single quantum dots (QDs) each in a separate InP/GaInP-based microdisk cavity via resonant whispering gallery modes. The investigations are based on as-fabricated coupled disk modes. We apply optical spectroscopy involving a 4f setup, as well as mode-sel...

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Bibliographic Details
Published in:Physical review. B 2018-01, Vol.97 (3), Article 035302
Main Authors: Seyfferle, S., Hargart, F., Jetter, M., Hu, E., Michler, P.
Format: Article
Language:English
Subjects:
Coupled modes
Energy transfer
Holes
Photoluminescence
Photon emission
Photons
Quantum dots
Whispering gallery modes
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Summary:We report on the radiative interaction of two single quantum dots (QDs) each in a separate InP/GaInP-based microdisk cavity via resonant whispering gallery modes. The investigations are based on as-fabricated coupled disk modes. We apply optical spectroscopy involving a 4f setup, as well as mode-selective real-space imaging and photoluminescence mapping to discern single QDs coupled to a resonant microdisk mode. Excitation of one disk of the double cavity structure and detecting photoluminescence from the other yields proof of single-photon emission of a QD excited by incoherent energy transfer from one disk to the other via a mode in the weak-coupling regime. Finally, we present evidence of photons emitted by a QD in one disk that are transferred to the other disk by a resonant mode and are subsequently resonantly scattered by another QD.
ISSN:2469-9950
2469-9969
DOI:10.1103/PhysRevB.97.035302