High speed microcircuit and synthetic biosignal widefield imaging using nitrogen vacancies in diamond

Abstract

The ability to measure the passage of electrical current with high spatial and temporal resolution is vital for applications ranging from inspection of microscopic electronic circuits to biosensing. Being able to image such signals passively and remotely at the same time is of high importance, to measure without invasive disruption of the system under study or the signal itself. A new approach to achieve this utilises point defects in solid state materials, in particular nitrogen vacancy (NV) centres in diamond. Acting as a high density array of independent sensors, addressable opto-electronically and highly sensitive to factors including temperature and magnetic field, these are ideally suited to microscopic widefield imaging. In this work we demonstrate such imaging of signals from a microscopic lithographically patterned circuit at the micrometer scale. Using a new type of lock-in amplifier camera, we demonstrate sub-millisecond (up to 3500 frames-per-second) spatially resolved recovery of AC and pulsed electrical current signals, without aliasing or undersampling. Finally, we demonstrate as a proof of principle the recovery of synthetic signals replicating the exact form of signals in a biological neural network: the hippocampus of a mouse.

References in corpus (11)

• High-sensitivity diamond magnetometer with nanoscale resolution
• Magnetic field imaging with NV ensembles
• Broadband Magnetometry and Temperature Sensing with a Light Trapping Diamond Waveguide
• Micrometer-scale Magnetic Imaging of Geological Samples Using a Quantum Diamond Microscope
• Real-time nanodiamond thermometry probing in-vivo thermogenic responses
• Imaging domain reversal in an ultrathin van der Waals ferromagnet
• Detection of biological signals from a live mammalian muscle using a diamond quantum sensor
• NV-Diamond Magnetic Microscopy using a Double Quantum 4-Ramsey Protocol
• Optimisation of a diamond nitrogen vacancy centre magnetometer for sensing of biological signals
• Simultaneous Wide-field Imaging of Phase and Magnitude of AC Magnetic Signal Using Diamond Quantum Magnetometry
• Wide-field dynamic magnetic microscopy using double-double quantum driving of a diamond defect ensemble

Cited by in corpus (6)

• Fast wide-field quantum sensor based on solid-state spins integrated with a SPAD array
• Three-dimensional imaging of integrated-circuit activity using quantum defects in diamond
• Optical Widefield Nuclear Magnetic Resonance Microscopy
• Mapping AC Susceptibility with Quantum Diamond Microscope
• Quantum diamond microscopy with optimized magnetic field sensitivity and sub-ms temporal resolution
• Diamond-on-chip infrared absorption magnetic field camera