Wide range electrical tunability of single photon emission from chromium-based colour centres in diamond

TL;DR

This paper demonstrates a method for electrically tuning the emission spectrum of chromium-based color centers in diamond, achieving a tunability range much larger than their linewidths, which is promising for quantum photonics.

Contribution

It introduces electrical control of single photon emission from chromium color centers in diamond with a tunability range significantly exceeding their linewidths.

Findings

Electrical tuning range is three orders of magnitude larger than the radiative linewidth.

Luminescence dependence suggests noncentrosymmetric atomic configurations.

Proposes Cr-X or X-Cr-Y configurations as likely structures for the centers.

Abstract

We demonstrate electrical control of the single photon emission spectrum from chromium-based colour centres implanted in monolithic diamond. Under an external electric field the tunability range is typically three orders of magnitude larger than the radiative linewidth and at least one order of magnitude larger than the observed linewidth. The electric and magnetic field dependence of luminescence gives indications on the inherent symmetry and we propose Cr-X or X-Cr-Y type noncentrosymmetric atomic configurations as most probable candidates for these centres.