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We report single plasmon generation with a self-assembled InAs/GaAs quantumdot embedded in a plasmonic microring resonator. The plasmonic cavity based ona GaAs microring is defined on an atomically-smooth silver surface. Wefabricated this structure with the help of transfer printing, which enables thepick-and-place assembly of the complicated, heterogeneous three dimensionalstack. We show that a high-order surface-plasmon-polariton transverse modemediates efficient coupling between the InAs/GaAs quantum dots and theplasmonic cavity, paving the way for developing plasmonic quantum light sourcesbased on the state-of-the-art solid-state quantum emitters. Experimentally, weobserved Purcell-enhanced radiation from the quantum dot coupled to theplasmonic mode. We also observed a strong anti-bunching in the intensitycorrelation histogram measured for scattered photons from the plasmonicresonator, indicating single plasmon generation in the resonator. Our resultswill be important in the development of quantum plasmonic circuits integratinghigh-performance single plasmon generators.

Single plasmon generation in an InAs/GaAs quantum dot in a transfer-printed plasmonic microring resonator