Towards Resolving the Ambiguity in Low-Field, All-Optical Magnetic Field Sensing with High NV-Density Diamonds
At a Glance
Section titled āAt a Glanceā| Metadata | Details |
|---|---|
| Publication Date | 2024-07-01 |
| Authors | Ludwig Horsthemke, Jens Pogorzelski, Dennis Stiegekƶtter, Frederik Hoffmann, Ann-Sophie BĆ¼lter |
| Institutions | FH MĆ¼nster |
| Citations | 5 |
Abstract
Section titled āAbstractāIn all-optical magnetic field sensing using nitrogen-vacancy-center-rich diamonds, an ambiguity in the range of 0-8 mT can be observed. We propose a way to resolve this ambiguity using the magnetic-field-dependent fluorescence lifetime. We therefore recorded the frequency response of the fluorescence upon modulation of the excitation intensity in a frequency range of 1-<inline-formula><math xmlns=āhttp://www.w3.org/1998/Math/MathMLā display=āinlineā><semantics><mrow><mn>100</mn><mspace width=ā3.33333ptā></mspace><mi>MHz</mi></mrow></semantics></math></inline-formula>. The magnetic-field-dependent decay dynamics led to different response characteristics for magnetic fields below and above <inline-formula><math xmlns=āhttp://www.w3.org/1998/Math/MathMLā display=āinlineā><semantics><mrow><mn>3</mn><mspace width=ā3.33333ptā></mspace><mi>mT</mi></mrow></semantics></math></inline-formula>, allowing us to resolve the ambiguity. We used a physics-based model function to extract fit parameters, which we used for regression, and compared it to an alternative approach purely based on an artificial neural network.
Tech Support
Section titled āTech SupportāOriginal Source
Section titled āOriginal SourceāReferences
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