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arXiv · 1909.01050

Continuous microwave hole burning and population oscillations in a diamond spin ensemble

Haitham A. R. El-Ella·Alexander Huck·Ulrik L. Andersen
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Abstract

Continuous spectral hole burning and spin-level population oscillations are studied in an inhomogeneously broadened diamond-based spin ensemble composed of substitutional nitrogen and nitrogen-vacancy centres created through neutron irradiation and annealing. The burnt spectral features highlight a detuning-dependent homogeneous hole linewidth that is up to three orders of magnitude narrower than the total inhomogeneous ensemble linewidth. Continuous population oscillations are observed to quickly decay beyond a pump and probe detuning of 5 Hz, and are numerically modelled using a five-level system of coupled rate equations. Fourier analysis of these oscillations highlight discrete $^{13}$C hyperfine interactions, with energies within the inhomogeneous ensemble linewidth, as well as suspected nuclear $3/2$-spin coupled signatures likely related to the $^7$Li byproduct of neutron irradiation.

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Haitham A. R. El-Ella, Alexander Huck, Ulrik L. Andersen. 2019-12-03. Continuous microwave hole burning and population oscillations in a diamond spin ensemble. https://doi.org/10.1103/physrevb.100.214407

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