Effective purcell suppression for high-yield manufacturing of ultra-efficient broadband micropillars

Quantum dot micropillars have the potential for delivering simultaneous ultra-high efficiency, indistinguishability, and purity while also operating in a broadband low-Q cavity regime. We present results from finite-difference time-domain simulations, theoretical models, and measurements of cavity photoluminescence to demonstrate the effect of Purcell suppression of undesirable leaky decay in well-designed micropillars. We demonstrate the possibility of increasing not only the on-resonance device efficiency, but also to increase the device bandwidth by 3.3-6.5 times and increase the yield of in-cavity quantum dots by 3-50 times compared to high-Q narrowband devices.