Methods and apparatus for optically detecting magnetic resonance
US10197515B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 8, 2014 |
| Grant date | Feb 5, 2019 |
| Priority date | — |
| Expiry date | Nov 11, 2037 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R33/323
- WIPO fieldMeasurement
- WIPO sectorInstruments
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.