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 of the inherent symmetry, and we propose Cr–X or X–Cr–Y-type non-centrosymmetric atomic configurations as the most probable candidates for these centres.
Highlights
Room-temperature operation of diamond-based colour centres offers a unique platform for the field of quantum photonics [1]
The colour centres under study were engineered by the ion implantation of chromium and oxygen into pure type IIA ([N] < 1 ppm, [B] < 0.05 ppm, Element Six) diamond crystals based on the protocol discussed in [19]
All of our measurements were carried out at liquid helium temperature (4 K) using a home-built confocal microscope, where the optical axis was aligned with the [001] crystallographic axis of the sample
Summary
The colour centres under study were engineered by the ion implantation of chromium and oxygen into pure type IIA ([N] < 1 ppm, [B] < 0.05 ppm, Element Six) diamond crystals based on the protocol discussed in [19]. The nitrogen-vacancy (NV) colour centre in diamond has attracted interest in diverse research fields, ranging from spin-based quantum information [2,3,4,5]
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