ABSTRACT
Numerous types of microcavities have been demonstrated to increase quantum dot (QD) single-photon emission. In this work, we demonstrate the first realization of a truncated Gaussian-shaped microcavity coupling to a QD. We describe the fabrication process based on wet-chemical etching and epitaxial overgrowth, achieving Q-factors around 6000. The experimental investigation of the cavity modes and their spatial profiles is in excellent agreement with simulations. We show that the fundamental mode wavelength can be reproducibly controlled via fabrication design. Temperature tuning of a QD inside a cavity on and off resonance with the cavity mode entails a reduction of the decay time when being on resonance, clearly indicating Purcell enhancement.
Publication: Purcell enhanced single-photon emission from a quantum dot coupled to a truncated Gaussian microcavity
Applied Physics Letters, 119(21)
Contact person: L. Engel
