Oscillator-based solid-state spin sensor

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United States of America Patent

PATENT NO 12032044
APP PUB NO 20210263117A1
SERIAL NO

17134589

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Abstract

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We have developed a high-performance, low-volume, low-weight, and low-power sensor based on a self-sustaining oscillator. The techniques described here may be used for sensing various fields; we demonstrate magnetic sensing. The oscillator is based on a dielectric resonator that contains paramagnetic defects and is connected to a sustaining amplifier in a feedback loop. The resonance frequency of the dielectric resonator shifts in response to changes in the magnetic field, resulting in a shift in the frequency of the self-sustaining oscillator. The value of the magnetic field is thereby encoded in the shift or modulation output of the self-sustaining oscillator. The sensor as demonstrated uses no optics, no input microwaves, and, not including digitization electronics, consumes less than 300 mW of power and exhibits a sensitivity at or below tens of pT/√{square root over (Hz)}. In some implementations, the sensor is less than 1 mL in volume.

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Patent Owner(s)

Patent OwnerAddress
MASSACHUSETTS INSTITUTE OF TECHNOLOGY77 MASSACHUSETTS AVENUE CAMBRIDGE MA 02139

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Barry, John F Arlington, US 7 37
Braje, Danielle A Winchester, US 8 35
Eisenach, Erik R Cambridge, US 4 28
Kedziora, Jessica Shirley, US 2 3
Majumder, Jonah A Cambridge, US 3 17
Moulton, Peter Concord, US 6 132
O'Keeffe, Michael F Medford, US 4 28
Pham, Linh M Arlington, US 7 89
Schloss, Jennifer Cambridge, US 2 1
Steinecker, Matthew Medford, US 2 3

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