Fluorescence Lifetime of NV Centers for Temperature-Insensitive All-Optical Magnetic Field Sensing

EasyChair Preprint 15104

Abstract

We investigate the combined temperature and magnetic field dependent behavior of high NV-density microdiamonds in an all-optical frequency-domain based setup, utilizing the change in fluorescence lifetime. We use these frequency-domain data to train neural networks for the prediction of temperatures and magnetic fields. At zero magnetic field, we show the ability to predict temperatures in the range of 0°C to 100°C, with a standard deviation of 1.24°C. Furthermore, we show the ability to predict applied magnetic fields, while varying the ambient temperature, with a higher accuracy, compared to the approach of observing of the fluorescence intensity at a single excitation frequency.

Keyphrases: All-optical, NV center, Temperature, fluorescence lifetime, magnetometry

@booklet{EasyChair:15104,
  author    = {Ludwig Horsthemke and Jens Pogorzelski and Dennis Stiegekoetter and Frederik Hoffmann and Ann-Sophie Bülter and Lutz Langguth and Robert Staacke and Sarah Trinschek and Markus Gregor and Peter Gloesekoetter},
  title     = {Fluorescence Lifetime of NV Centers for Temperature-Insensitive All-Optical Magnetic Field Sensing},
  howpublished = {EasyChair Preprint 15104},
  year      = {EasyChair, 2024}}