Stationary magic angle spinning enhanced solid state spin sensor

US10705163B2 · kind B2 · utility

Assignee

• Massachusetts Institute of Technology · US

Inventors

• John F. Barry · Cambridge, US
• Danielle A. Braje · Winchester, US
• Erik R. Eisenach · Cambridge, US
• Christopher Michael McNally · Cambridge, US
• Michael F. O'Keeffe · Medford, US
• Linh M. Pham · Cambridge, US

Key dates

• Filing date: Nov 29, 2018
• Grant date: Jul 7, 2020
• Expiry date: Nov 29, 2038

Classification

• Technology area (CPC G): Physics
• CPC primary: G01R33/3607
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

Here we present a solid-state spin sensor with enhanced sensitivity. The enhanced sensitivity is achieved by increasing the T2* dephasing time of the color center defects within the solid-state spin sensor. The T2* dephasing time extension is achieved by mitigating dipolar coupling between paramagnetic defects within the solid-state spin sensor. The mitigation of the dipolar coupling is achieved by applying a magic-angle-spinning magnetic field to the color center defects. This field is generated by driving a magnetic field generator (e.g., Helmholtz coils) with phase-shifted sinusoidal waveforms from current source impedance-matched to the magnetic field generator. The waveforms may oscillate (and the field may rotate) at a frequency based on the precession period of the color center defects to reduce color center defect dephasing and further enhance measurement sensitivity.