Entanglement in optical circuits based on Mie resonant metastructures integrated with on-chip array of single photon sources*

An essential milestone to scalable on-chip optical quantum information processing (QIP) is realization of entanglement in optical circuits built around on-chip single photon sources (SPSs) in regular arrays [1,2]. We have introduced and analyzed the potential of a single collective Mie resonance of dielectric building blocks (DBBs) based metastructures [3] to provide the needed functions of enhanced emission rate and directionality, state-preserving propagation, splitting, and combining photons emitted by the SPSs of the array over a broad ~10nm wavelength range. Unlike the conventional approach of photonic crystals, the Mie resonance approach ensures spectral matching with the SPS. In this talk we will present: (a) FEM-based simulations of DBB metastructure enabled coupling between distinct SPSs over long range mediated by photons in Mie states resulting in super-radiance; (b) Von-Neumann - Lindblad approach based analysis that shows the emergence of coherence between distant SPSs resulting in entanglement- a critical need towards QIP.
[1] J. Zhang et.al, J.Appl.Phys.120,243103(2016)
[2] J. Zhang et. al. APL Photonics, Accepted for publication.
[3] S. Chattaraj et.al, IEEE JQE 56, 1(2019)