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

Haitham A. R. El-Ella*, Alexander Huck, Ulrik Lund Andersen

*Corresponding author for this work

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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 centers 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 13C hyperfine interactions, with energies within the inhomogeneous ensemble linewidth, as well as suspected nuclear 3/2
- spin coupled signatures likely related to the 7Li byproduct of neutron irradiation.
Original languageEnglish
Article number214407
JournalPhysical Review B
Issue number21
Number of pages9
Publication statusPublished - 2019

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