  Generation of single and entangled photons is crucial for photonic quantum
information processing. Quantum dots (QDs) are promising sources capable of
producing high-quality quantum light states on demand, although at a rate
typically limited by their spontaneous radiative lifetime. In this study, we
utilize the Purcell effect to demonstrate up to a 38-fold enhancement in the
emission rate of InAs QDs. We achieve this by coupling individual QDs to
metal-clad GaAs nanopillars characterized with mode volume of 4.5x10-4
({\lambda}/n)3 and quality factor of 62, consequently enabling high Purcell
enhancement across a bandwidth of 15 nm. We measure a multi-photon emission
probability as low as 0.5 % from QDs within these cavities. In addition to
providing a valuable platform for exploring light-matter interaction at the
nanoscale, this work represents a significant stride towards developing
QD-sources emitting at high repetition rates, underpinning their role in the
future of quantum communication and computing.
