On-chip quantum optics with electrically driven quantum dot micropillar cavities

In this contribution, a novel concept for on-chip quantum optics and fully integrated quantum light sources is presented. The concept combines so far independent routes in the emerging field of cQED in solid state within an integrated nanophotonics device concept with unprecedented features. The proposed concept utilizes the fact that micropillar cavities allow for the localization of vertically emitting modes and laterally emitting whispering gallery modes (WGMs). This approach takes advantage of this unique opportunity provided by the micropillar geometry and comprises an electrically pumped WGM micropillar acting as in-plane laser source and radially displaced QD-micropillars which are optically pumped by the integrated microlaser. This specific configuration allows for the first time on-chip quantum optics in the cQED regime using an integrated coherent light source.