Abstract: A solid-state spin sensor system for precisely measuring magnetic fields with a compliantly coupled sensor head exhibiting translational and rotational compliance. The sensor includes a color center ensemble in a solid-state substrate for detecting magnetic fields with high spatial resolution. An optical microscope, in conjunction with an optical driving system, facilitates viewing and spin polarization of the color center ensemble. A magnetic field generator ensures biasing of the ensemble for better sensitivity, and a microwave driving system induces spin transitions within the ensemble. Actuation is controlled by a system responsive to force data or image data for precise positioning of the color center ensemble focally and in contact with a sample. The system generates a spatially resolved map of a magnetic field through analysis of fluorescence data. Methods for measuring and mapping fields with fiducials and force feedback are also included, enabling wide-field quantum sensing of irregular surfaces.

Abstract: A solid-state spin sensor system for precisely measuring magnetic fields with a compliantly coupled sensor head exhibiting translational and rotational compliance is disclosed. The sensor includes a color center ensemble in a solid-state substrate for detecting magnetic fields with high spatial resolution. An optical microscope, in conjunction with an optical driving system, facilitates viewing and spin polarization of the color center ensemble. A magnetic field generator ensures biasing of the ensemble for better sensitivity, and a microwave driving system induces spin transitions within the ensemble. Actuation is controlled by a system responsive to force data or image data for precise positioning of the color center ensemble focally and in contact with a sample. The system generates a spatially resolved map of a magnetic field through analysis of fluorescence data.

Abstract: A method and a device for performing homonuclear J-coupling spectroscopy on a sample, the method including: a) producing transverse magnetization in the sample by applying an RF excitation pulse at a nuclear magnetic resonance (NMR) frequency; b) after a delay ?, applying a refocusing pulse to the sample; c) performing a step of, applying another refocusing pulse to the sample after a delay 2?, N times, where N ranges from Nmin to Nmax; d) following a final one of the refocusing pulses, acquiring an NMR signal from the sample; and repeating steps a)-c) for different values of N, adjusting ? so that a total time T=2(N+1)? remains constant, where T is a time between a start of the RF excitation pulse and a center or a start of a final one of the NMR signals.