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Quantum electrometry of non-volatile space charges in diamond

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arxiv 2410.19309 v1 pith:D5OMXF6Q submitted 2024-10-25 cond-mat.mes-hall physics.app-phquant-ph

R. M. Goldblatt , N. Dontschuk , D. J. McCloskey , A. M. Martin , A. A. Wood This is my paper
classification cond-mat.mes-hallphysics.app-phquant-ph
keywords chargechargesspaceelectricelectrometryapplieddiamondfield
verification ladder T0 review T1 audit T2 compute T3 formal
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The microscopic electric environment surrounding a spin defect in a wide-bandgap semiconductor plays a determining role in the spin coherence and charge stability of a given qubit and has an equally important role in defining the electrical properties of the host material. Here, we use electrometry of quantum defects embedded within a diamond to observe stable, micron-scale space charge distributions formed from trapped photogenerated charges. These space charges grow under optical illumination in the presence of an applied electric field, eventually screening the applied electric field entirely over a spatial extent of tens of microns due to charge carrier drift and capture. Our measurements suggest that these space charge fields originate from widely-dispersed spatial configurations of nitrogen charges. Our results have important consequences for electrometry and photoelectric detection using qubits in wide-bandgap semiconductors.

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Cited by 3 Pith papers

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  1. Density-functional theory study of the interaction between NV$^{-}$ centers and native defects in diamond

    cond-mat.mtrl-sci 2025-07 conditional novelty 6.0 of 10

    Native defects in diamond measurably shift NV- optical transitions out to roughly 1 micrometer for charged defects via electric fields and about 200 nanometers via strain, enabling multi-NV defect characterization.

  2. Photorefractive tuning seeded by third-harmonic light in a diamond photonic crystal cavity

    physics.optics 2025-07 conditional novelty 6.0 of 10

    Third-harmonic green light generated inside a diamond nanocavity seeds a photorefractive effect that blue-shifts the cavity resonance by 20.2 GHz, enabling deterministic in-situ tuning.

  3. Beyond ensemble averaging: Parallelized single-shot readout of hole capture in diamond

    cond-mat.mes-hall 2025-07 conditional novelty 6.0 of 10

    Using widefield resonant spectroscopy of hundreds of NV centers, the authors perform parallel single-shot readout of individual hole capture events in diamond and measure capture radii up to about 200 nm, near the Ons...

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