公开(公告)号：US10712408B2

公开(公告)日：2020-07-14

申请号：US15807269

申请日：2017-11-08

Applicant: Massachusetts Institute of Technology

Inventor： Linh M. Pham ,  Carson Arthur Teale ,  Hannah A. Clevenson ,  Kerry Alexander Johnson ,  Christopher Michael McNally ,  John Francis Barry ,  Danielle Ann Braje

IPC: G01R33/26 ,  G01R33/24 ,  G01N24/10 ,  G01N24/12 ,  G01R33/32

Abstract: A magnetometer containing a crystal sensor with solid-state defects senses the magnitude and direction of a magnetic field. The solid-state defects in the crystal sensor absorb microwave and optical energy to transition between several energy states while emitting light intensity indicative of their spin states. The magnetic field alters the spin-state transitions of the solid-state defects by amounts depending on the solid-state defects' orientations with respect to the magnetic field. The optical read out, reporting the spin state of an ensemble of solid-state defects from one particular orientation class, can be used to lock microwave signals to the resonances associated with the spin-state transitions. The frequencies of the locked microwave signals can be used to reconstruct the magnetic field vector.

公开(公告)号：US11346904B2

公开(公告)日：2022-05-31

申请号：US16946756

申请日：2020-07-06

Applicant: Massachusetts Institute of Technology

Inventor： Linh M. Pham ,  Kerry Alexander Johnson ,  Carson Arthur Teale ,  Hannah A. Clevenson ,  Danielle Ann Braje ,  Christopher Michael McNally ,  John Francis Barry

IPC: G01R33/26 ,  G01R33/24 ,  G01R33/32 ,  G01N24/10 ,  G01N24/12

Abstract: A magnetometer containing a crystal sensor with solid-state defects senses the magnitude and direction of a magnetic field. The solid-state defects in the crystal sensor absorb microwave and optical energy to transition between several energy states while emitting light intensity indicative of their spin states. The magnetic field alters the spin-state transitions of the solid-state defects by amounts depending on the solid-state defects' orientations with respect to the magnetic field. The optical read out, reporting the spin state of an ensemble of solid-state defects from one particular orientation class, can be used to lock microwave signals to the resonances associated with the spin-state transitions. The frequencies of the locked microwave signals can be used to reconstruct the magnetic field vector.