Method and apparatus for measuring magnetic field strength
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United States of America Patent
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Sep 19, 2023
Grant Date -
Dec 10, 2020
app pub date -
Aug 24, 2020
filing date -
Nov 10, 2017
priority date (Note) -
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Abstract
An apparatus for measuring a magnetic field strength is provided. The apparatus includes a stage on which a sample to be measured is placed, a cantilever having a tip, an optical system having a light source and a light receiver, and a microwave power source. The tip is a diamond tip having a nitrogen vacancy defect. The optical system is configured such that excitation light from the light source is focused at the diamond tip. The cantilever is configured as a coaxial microwave antenna through which microwaves from the microwave power source are supplied to the diamond tip.
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