Nonradiant multiphoton states in quantum ring oligomers
Nikita Ustimenko, Danil Kornovan, Ilya A. Volkov, A. S. Sheremet, Roman S. Savelev, Mihail I. Petrov · Physical Review A · 2024
The authors suggest a method to enhance the lifetime of double excitations in quantum emitter ensembles by suppressing radiative emission. They employ the Friedrich-Wintgen mechanism of external coupling, akin to the formation of bound states in the continuum. Consequently, the generation of entangled photon pairs with nonzero angular momentum from quantum rings was predicted.