  Cavity-enhanced emission of electrically controlled semiconductor quantum
dots is essential in developing bright quantum devices for real-world quantum
photonic applications. Combining the circular Bragg grating (CBG) approach with
a PIN-diode structure, we propose and implement an innovative concept for
ridge-based electrically-contacted CBG resonators. Through fine-tuning of
device parameters in numerical simulations and deterministic nanoprocessing, we
produced electrically controlled single quantum dot CBG resonators with
excellent electro-optical emission properties. These include multiple
wavelength-tunable emission lines and a photon extraction efficiency (PEE) of
up to (30.4$\pm$3.4)%, where refined numerical optimization based on
experimental findings suggests a substantial improvement, promising PEE >50%.
Additionally, the developed quantum light sources yield single-photon purity
reaching (98.8$\pm$0.2)% [post-selected: (99.5$\pm$0.3)%] and a photon
indistinguishability of (25.8$\pm$2.1)% [post-selected: (92.8$\pm$4.8)%]. Our
results pave the way for high-performance quantum devices with combined cavity
enhancement and deterministic charge-environment controls, advancing the
development of photonic quantum information systems such as complex quantum
repeater networks.
