Efficient Single Photon Sources Based on Quantum Metasurfaces

In this talk, we will demonstrate compact metasurfaces to efficiently generate entangled and correlated single-photon pairs with unprecedently high Spontaneous Parametric Down-Conversion (SPDC) generation rates mainly due to the improved efficiency of the classical counterpart of Sum Frequency Generation (SFG) non-linear optical process. We will also present recent efforts to enhance the single photon emission from plasmonic nanocavity metasurfaces embedded with hexagonal boron nitride. The exciting new field of quantum metasufaces promises to lead to a plethora of novel optical devices for communications and computing applications in the quantum realm, such as compact single-photon sources and quantum sensors.