US 12,032,044 B2
Oscillator-based solid-state spin sensor
Danielle A. Braje, Winchester, MA (US); Jennifer Schloss, Cambridge, MA (US); Linh M. Pham, Arlington, MA (US); John F. Barry, Arlington, MA (US); Erik R. Eisenach, Cambridge, MA (US); Michael F. O'Keeffe, Medford, MA (US); Jonah A. Majumder, Cambridge, MA (US); Jessica Kedziora, Shirley, MA (US); Peter Moulton, Concord, MA (US); and Matthew Steinecker, Medford, MA (US)
Assigned to Massachusetts Institute of Technology, Cambridge, MA (US)
Filed by Massachusetts Institute of Technology, Cambridge, MA (US)
Filed on Dec. 28, 2020, as Appl. No. 17/134,589.
Claims priority of provisional application 62/981,982, filed on Feb. 26, 2020.
Prior Publication US 2021/0263117 A1, Aug. 26, 2021
Int. Cl. G01R 33/24 (2006.01); H01P 1/18 (2006.01); H01P 3/06 (2006.01); H01P 5/18 (2006.01); H01P 7/10 (2006.01); H03B 5/18 (2006.01)
CPC G01R 33/24 (2013.01) [H01P 1/18 (2013.01); H01P 3/06 (2013.01); H01P 5/18 (2013.01); H01P 7/10 (2013.01); H03B 5/1864 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A magnetometer comprising:
a solid-state host comprising paramagnetic defects having spin resonances that shift in response to a magnetic field;
a sustaining amplifier, connected in a positive feedback loop with the solid-state host, to amplify a microwave signal modulated by a shift in the spin resonances of the paramagnetic defects caused by the magnetic field; and
a digitizer, in electrical communication with the sustaining amplifier and/or the solid-state host, to digitize a portion of the microwave signal,
wherein the magnetometer does not include a laser, an external microwave source, or a photodetector.