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 ab initio 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 photoluminescene 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.
@article{arxiv.1706.05224,
title = {Single-photon interaction between two quantum dots located in different cavities of a weakly coupled double microdisk structure},
author = {Simon Seyfferle and Fabian Hargart and Michael Jetter and Evelyn Hu and Peter Michler},
journal= {arXiv preprint arXiv:1706.05224},
year = {2018}
}