Stark Tuning of Telecom Single-Photon Emitters Based on a Single Er3+

The implementation of scalable quantum networks requires photons at the telecom band and long-lived spin coherence. The single Er3+in solid-state hosts is an important candidate that fulfills these critical requirements simultaneously. However, to entangle distant Er3+ions through photonic connections, the emission frequency of individual Er3+in solid-state matrix must be the same, which is challenging because the emission frequency of Er3+depends on its local environment. Herein, we propose and experimentally demonstrate the Stark tuning of the emission frequency of a single Er3+in a Y2SiO5crystal by employing electrodes interfaced with a silicon photonic crystal cavity. We obtain a Stark shift of 182.9±0.8 MHz, which is approximately 27 times of the optical emission linewidth, demonstrating promising applications in tuning the emission frequency of independent Er3+into the same spectral channels. Our results provide a useful solution for construction of scalable quantum networks based on single Er3+and a universal tool for tuning emission of individual rare-earth ions.