Large-Range Tuning and Stabilization of the Optical Transition of Diamond Tin-Vacancy Centers by In-Situ Strain Control

TL;DR

This paper demonstrates large-range in-situ strain tuning and stabilization of the optical transition of diamond tin-vacancy centers, enabling scalable quantum networks by overcoming environmental frequency shifts.

Contribution

It introduces micro-electro-mechanically mediated strain control for tuning and stabilizing SnV- centers' optical transitions on-chip.

Findings

Achieved >40 GHz tuning range covering inhomogeneous distribution

Implemented real-time feedback for frequency stabilization

Enabled potential for scalable diamond-based quantum networks

Abstract

The negatively charged tin-vacancy (SnV-) center in diamond has emerged as a promising platform for quantum computing and quantum networks. To connect SnV- qubits in large networks, in-situ tuning and stabilization of their optical transitions are essential to overcome static and dynamic frequency offsets induced by the local environment. Here we report on the large-range optical frequency tuning of diamond SnV- centers using micro-electro-mechanically mediated strain control in photonic integrated waveguide devices. We realize a tuning range of >40 GHz, covering a major part of the inhomogeneous distribution. In addition, we employ real-time feedback on the strain environment to stabilize the resonant frequency and mitigate spectral wandering. These results provide a path for on-chip scaling of diamond SnV-based quantum networks.