Imaging of electrical signals in a quantum SiC microscope

• URL: http://arxiv.org/abs/2509.14888v1
• Date: Thu, 18 Sep 2025 12:10:04 GMT
• Title: Imaging of electrical signals in a quantum SiC microscope
• Authors: A. Suhana, T. A. U. Svetikova, C. Schneider, M. Helm, A. N. Anisimov, G. V. Astakhov,
• Abstract summary: We report the experimental realization of a quantum silicon carbide microscope (QSiCM) and demonstrate its functionality by imaging magnetic fields generated by electrical currents.<n>We employ a dual-frequency sensing protocol to enhance the readout contrast and suppress noise arising from strain and temperature fluctuations.<n>This approach enables spatial imaging of current-induced magnetic fields with a field of view of $50 times 50 $ virtual pixels, temporal resolution of $50,mathrmms$, spatial resolution of $30,mathrmmu m$ and sensitivity of about $2,mathrmmu T
• Score: 0.0
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: We report the experimental realization of a quantum silicon carbide microscope (QSiCM) and demonstrate its functionality by imaging magnetic fields generated by electrical currents. We employ a dual-frequency sensing protocol to enhance the readout contrast and suppress noise arising from strain and temperature fluctuations. This approach enables spatial imaging of current-induced magnetic fields with a field of view of $50 \times 50 $ virtual pixels, temporal resolution of $50\,\mathrm{ms}$, spatial resolution of $30\,\mathrm{\mu m}$ and sensitivity of about $2\,\mathrm{\mu T \, Hz^{-1/2}}$ per pixel. Further sensitivity enhancement is anticipated through the use of isotopically purified SiC and improved light collection in crystallographically optimized wafer orientations. In addition, we implement a microwave-free imaging protocol based on spin level anticrossing, offering simplified operation with enhanced sensitivity. The demonstrated platform is compatible with commercial, wafer-scale fabrication and holds strong potential for applications in biomedical imaging and diagnostics, as well as non-invasive current and temperature mapping in high-power electronic devices.

Related papers

• Toward a CMOS-integrated quantum diamond biosensor based on NV centers [27.327120599253046]
  We report progress toward a CMOS-integrated quantum diamond biosensing platform.<n>The system integrates on-chip active quenching and digital readout with external FPGA-based photon counting.<n>Magnetic field sensitivity of approximately 90 nT/$sqrtmathrmHz$ per pixel is estimated.
  arXiv  Detail & Related papers  (2026-02-24T00:37:17Z)
• Robust AC vector sensing at zero magnetic field with pentacene [45.7221176995052]
  Quantum sensors based on electronic spins have emerged as powerful probes of microwave-frequency fields.<n>Here, we demonstrate microwave vector magnetometry using the photoexcited spin triplet of pentacene molecules.
  arXiv  Detail & Related papers  (2025-12-06T03:49:12Z)
• Quantum magnetic imaging of current density in lithium-ion batteries [0.0]
  We present a sensitive quantum-magnetometry method that uses optically pumped magnetometers (OPMs) to perform real-time imaging of internal dynamics in open-circuit configuration.<n>The measurement results are benchmarked against superconducting-quantum-interference-device (SQUID) magnetometry and validated with three-dimensional finite element simulations.<n>This work establishes OPM-based magnetic imaging of battery current density as a powerful diagnostic tool with potential impact on cell development, manufacturing quality assurance, and second-life assessment.
  arXiv  Detail & Related papers  (2025-11-30T22:32:34Z)
• Computed tomography of propagating microwave photons [0.5699788926464752]
  Propagating photons serve as essential links for distributing quantum information and entanglement across distant nodes.<n>Knowledge of their Wigner functions not only enables their deployment as active information carriers but also provides error diagnostics when photons passively leak from a quantum processing unit.<n>Here, we demonstrate amplification-free Wigner function tomography of propagating microwave photons using a superconductor--normal-metal--superconductor bolometer.
  arXiv  Detail & Related papers  (2025-06-25T10:58:28Z)
• Design and simulation of a transmon qubit chip for Axion detection [103.69390312201169]
  Device based on superconducting qubits has been successfully applied in detecting few-GHz single photons via Quantum Non-Demolition measurement (QND) In this study, we present Qub-IT's status towards the realization of its first superconducting qubit device.
  arXiv  Detail & Related papers  (2023-10-08T17:11:42Z)
• Quantum Diamond Microscope for Dynamic Imaging of Magnetic Fields [0.602276990341246]
  Recently, wide-field NV magnetic imaging based on the Ramsey protocol has achieved uniform and enhanced sensitivity compared to conventional measurements. We integrate the Ramsey-based protocol with spin-bath driving to extend the NV spin dephasing time and improve magnetic sensitivity. We discuss potential new applications of this dynamic QDM in studying biomineralization and electrically-active cells.
  arXiv  Detail & Related papers  (2023-09-12T20:23:11Z)
• Two-dimensional Planck spectroscopy for microwave photon calibration [0.0]
  We present an improved method for the microwave loss estimation inside of a closed cryogenic system. Our approach is based on Planck's law and makes use of independent temperature sweeps of individual parts of the cryogenic set-up.
  arXiv  Detail & Related papers  (2023-08-04T15:33:30Z)
• High speed microcircuit and synthetic biosignal widefield imaging using nitrogen vacancies in diamond [44.62475518267084]
  We show how to image signals from a microscopic lithographically patterned circuit at the micrometer scale. Using a new type of lock-in amplifier camera, we demonstrate sub-millisecond spatially resolved recovery of AC and pulsed electrical current signals. Finally, we demonstrate as a proof of principle the recovery of synthetic signals replicating the exact form of signals in a biological neural network.
  arXiv  Detail & Related papers  (2021-07-29T16:27:39Z)
• Continuous-Wave Frequency Upconversion with a Molecular Optomechanical Nanocavity [46.43254474406406]
  We use molecular cavity optomechanics to demonstrate upconversion of sub-microwatt continuous-wave signals at $sim$32THz into the visible domain at ambient conditions. The device consists in a plasmonic nanocavity hosting a small number of molecules. The incoming field resonantly drives a collective molecular vibration, which imprints an optomechanical modulation on a visible pump laser.
  arXiv  Detail & Related papers  (2021-07-07T06:23:14Z)
• Near-Field Terahertz Nanoscopy of Coplanar Microwave Resonators [61.035185179008224]
  Superconducting quantum circuits are one of the leading quantum computing platforms. To advance superconducting quantum computing to a point of practical importance, it is critical to identify and address material imperfections that lead to decoherence. Here, we use terahertz Scanning Near-field Optical Microscopy to probe the local dielectric properties and carrier concentrations of wet-etched aluminum resonators on silicon.
  arXiv  Detail & Related papers  (2021-06-24T11:06:34Z)
• Detection of biological signals from a live mammalian muscle using a diamond quantum sensor [41.91891973513696]
  We show an alternative technique for detecting magnetic fields generated by the current from action potentials in living tissue using nitrogen vacancy centres in diamond. We show these measurements can be performed in an ordinary, unshielded lab environment and that the signal can be easily recovered by digital signal processing techniques.
  arXiv  Detail & Related papers  (2020-08-03T16:40:44Z)
• Optimisation of a diamond nitrogen vacancy centre magnetometer for sensing of biological signals [44.62475518267084]
  We present advances in biomagnetometry using nitrogen vacancy centres in diamond. We show magnetic field sensitivity of approximately 100 pT/$sqrtHz$ in the DC/low frequency range using a setup designed for biological measurements.
  arXiv  Detail & Related papers  (2020-04-05T18:44:34Z)

This list is automatically generated from the titles and abstracts of the papers in this site.

This site does not guarantee the quality of this site (including all information) and is not responsible for any consequences.