Loss suppression by engineering atomic geometries in silicon photonics

By engineering atomic geometries composed of nearly 1000 atomic segments embedded in microresonators we observe anomalous photon emission at the telecommunication wavelength. Erbium atoms are geometrically arranged into a lattice inside a silicon nitride microring resonator giving rise to reduced propagation losses. We confirm dependency of light emission to the atomic positions and lattice spacing and observe Fano interference between optical and atomic modes. Our observation may enable design of active silicon materials and novel topology for broad applications in quantum information.