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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
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.
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Patent Agency Ranking
公开(公告)号：US10648933B2
公开(公告)日：2020-05-12
申请号：US16232137
申请日：2018-12-26
Applicant: Massachusetts Institute of Technology
Inventor： Hannah A. Clevenson , Dirk Robert Englund
Abstract: A light-trapping geometry enhances the sensitivity of strain, temperature, and/or electromagnetic field measurements using nitrogen vacancies in bulk diamond, which have exterior dimensions on the order of millimeters. In an example light-trapping geometry, a laser beam enters the bulk diamond, which may be at room temperature, through a facet or notch. The beam propagates along a path inside the bulk diamond that includes many total internal reflections off the diamond's surfaces. The NVs inside the bulk diamonds absorb the beam as it propagates. Photodetectors measure the transmitted beam or fluorescence emitted by the NVs. The resulting transmission or emission spectrum represents the NVs' quantum mechanical states, which in turn vary with temperature, magnetic field strength, electric field strength, strain/pressure, etc.
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公开(公告)号：US10895542B2
公开(公告)日：2021-01-19
申请号：US16871123
申请日：2020-05-11
Applicant: Massachusetts Institute of Technology
Inventor： Hannah A. Clevenson , Dirk Englund
Abstract: A light-trapping geometry enhances the sensitivity of strain, temperature, and/or electromagnetic field measurements using nitrogen vacancies in bulk diamond, which have exterior dimensions on the order of millimeters. In an example light-trapping geometry, a laser beam enters the bulk diamond, which may be at room temperature, through a facet or notch. The beam propagates along a path inside the bulk diamond that includes many total internal reflections off the diamond's surfaces. The NVs inside the bulk diamonds absorb the beam as it propagates. Photodetectors measure the transmitted beam or fluorescence emitted by the NVs. The resulting transmission or emission spectrum represents the NVs' quantum mechanical states, which in turn vary with temperature, magnetic field strength, electric field strength, strain/pressure, etc.
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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
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.
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公开(公告)号：US20190145919A1
公开(公告)日：2019-05-16
申请号：US16232137
申请日：2018-12-26
Applicant: Massachusetts Institute of Technology
Inventor： Hannah A. Clevenson , Dirk Robert Englund
Abstract: A light-trapping geometry enhances the sensitivity of strain, temperature, and/or electromagnetic field measurements using nitrogen vacancies in bulk diamond, which have exterior dimensions on the order of millimeters. In an example light-trapping geometry, a laser beam enters the bulk diamond, which may be at room temperature, through a facet or notch. The beam propagates along a path inside the bulk diamond that includes many total internal reflections off the diamond's surfaces. The NVs inside the bulk diamonds absorb the beam as it propagates. Photodetectors measure the transmitted beam or fluorescence emitted by the NVs. The resulting transmission or emission spectrum represents the NVs' quantum mechanical states, which in turn vary with temperature, magnetic field strength, electric field strength, strain/pressure, etc.
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公开(公告)号：US10197515B2
公开(公告)日：2019-02-05
申请号：US14325937
申请日：2014-07-08
Applicant: Massachusetts Institute of Technology
Inventor： Hannah A. Clevenson , Dirk Robert Englund
Abstract: A light-trapping geometry enhances the sensitivity of strain, temperature, and/or electromagnetic field measurements using nitrogen vacancies in bulk diamond, which have exterior dimensions on the order of millimeters. In an example light-trapping geometry, a laser beam enters the bulk diamond, which may be at room temperature, through a facet or notch. The beam propagates along a path inside the bulk diamond that includes many total internal reflections off the diamond's surfaces. The NVs inside the bulk diamonds absorb the beam as it propagates. Photodetectors measure the transmitted beam or fluorescence emitted by the NVs. The resulting transmission or emission spectrum represents the NVs' quantum mechanical states, which in turn vary with temperature, magnetic field strength, electric field strength, strain/pressure, etc.
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