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公开(公告)号：US20210255258A1
公开(公告)日：2021-08-19
申请号：US17188316
申请日：2021-03-01
Applicant: Massachusetts Institute of Technology
Inventor： John F. Barry , Erik R. Eisenach , Michael F. O'Keeffe , Jonah A. Majumder , Linh M. Pham , Isaac Chuang , Erik M. Thompson , Christopher Louis Panuski , Xingyu Zhang , Danielle A. Braje
Abstract: Microwave resonator readout of the cavity-spin interaction between a spin defect center ensemble and a microwave resonator yields fidelities that are orders of magnitude higher than is possible with optical readouts. In microwave resonator readout, microwave photons probe a microwave resonator coupled to a spin defect center ensemble subjected to a physical parameter to be measured. The physical parameter shifts the spin defect centers' resonances, which in turn change the dispersion and/or absorption of the microwave resonator. The microwave photons probe these dispersion and/or absorption changes, yielding a measurement with higher visibility, lower shot noise, better sensitivity, and higher signal-to-noise ratio than a comparable fluorescence measurement. In addition, microwave resonator readout enables coherent averaging of spin defect center ensembles and is compatible with spin systems other than nitrogen vacancies in diamond.
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公开(公告)号：US11041916B2
公开(公告)日：2021-06-22
申请号：US16106802
申请日：2018-08-21
Applicant: Massachusetts Institute of Technology
Inventor： Linh M. Pham , Erik M. Thompson , John F. Barry , Kerry A. Johnson , Danielle A. Braje
Abstract: Applying a bias magnetic field to a solid-state spin sensor enables vector magnetic field measurements with the solid-state spin sensor. Unfortunately, if the bias magnetic field drifts slowly, it creates noise that confounds low-frequency field measurements. Fortunately, the undesired slow drift of the magnitude of the bias magnetic field can be removed, nullified, or cancelled by reversing the direction (polarity) of the bias magnetic field at known intervals. This makes the resulting solid-state spin sensor system suitable for detecting low-frequency (mHz, for example) changes in magnetic field or other physical parameters.
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公开(公告)号：US10983245B2
公开(公告)日：2021-04-20
申请号：US16054912
申请日：2018-08-03
Applicant: Massachusetts Institute of Technology
Inventor： William Joseph Blackwell , Michael DiLiberto , James V. Eshbaugh , Christopher J. Galbraith , Steven Gillmer , Robert Leslie , Idahosa A. Osaretin , Joseph Racamato , Erik M. Thompson
IPC: G01V8/00
Abstract: A system may comprise a scanner assembly and a radiometer. The radiometer may comprise a W-Band and F-Band receiver and an intermediate frequency processor. The system may be rotatably mounted to a bus via the scanner assembly.
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公开(公告)号：US10962611B2
公开(公告)日：2021-03-30
申请号：US16551799
申请日：2019-08-27
Applicant: Massachusetts Institute of Technology
Inventor： John F. Barry , Erik R. Eisenach , Michael F. O'Keeffe , Jonah A. Majumder , Linh M. Pham , Isaac Chuang , Erik M. Thompson , Christopher Louis Panuski , Xingyu Zhang , Danielle A. Braje
Abstract: Microwave resonator readout of the cavity-spin interaction between a spin defect center ensemble and a microwave resonator yields fidelities that are orders of magnitude higher than is possible with optical readouts. In microwave resonator readout, microwave photons probe a microwave resonator coupled to a spin defect center ensemble subjected to a physical parameter to be measured. The physical parameter shifts the spin defect centers' resonances, which in turn change the dispersion and/or absorption of the microwave resonator. The microwave photons probe these dispersion and/or absorption changes, yielding a measurement with higher visibility, lower shot noise, better sensitivity, and higher signal-to-noise ratio than a comparable fluorescence measurement. In addition, microwave resonator readout enables coherent averaging of spin defect center ensembles and is compatible with spin systems other than nitrogen vacancies in diamond.
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