Observation of collective emission of subwavelength atom-like emitter arrays

In 2020 we suggested quantum metasurfaces as a new platform for quantum optics. Quantum metasurfaces are subwavelength atomic arrays that quantum control the response to light by employing the enhanced collective response of subwavelength arrays along with Rydberg long-range interactions. Our original proposal was soon experimentally realized with ultra-cold atomic arrays and followed by many theoretical proposals, employing quantum metasurfaces to entanglement generation protocols and computing.

I will present emitter arrays that are spatially scalable and potentially integrable with nanophotonics elements. In our experiments we deterministically prepare two-dimensional sub-wavelength Silicon-Vacancy centers (SiV) arrays as a realization of the quantum metasurfaces system. We explore various lattice symmetries and characterize their unique optical response, including the effect of array size and and spacings. I will describe our developed theoretical protocols for quantum control by employing lattices’ symmetry breaking, and SiV’s degrees of freedom as opposed to the Rydberg Blockade mechanism that was employed in our original atomic proposal. Finally, I will discuss how integration of the SiV arrays with nanophotonics elements affects the collective states and hence the response to light, enabling exploration of both fundamental phenomena and improved fidelities.