preprints

1. Characterization of Autofluorescence in Optical Fibers for NV-based Sensing Applications
   Stefan Johansson, Alexander Bukschat, Dennis Lönard, Alena Erlenbach, Jonas Gutsche, Artur Widera
   preprint, arXiv:2602.07536
   https://doi.org/10.48550/arXiv.2602.07536
    

2026

1. Limits of absolute vector magnetometry with nitrogen-vacancy centers in diamond
   Dennis Lönard, Isabel Cardoso Barbosa, Stefan Johansson, Jonas Gutsche, Artur Widera
   Phys. Rev. Research 8, 013054 (2026)
   https://doi.org/10.1103/28t7-7gcn
    
2. Exact computation of lock-in amplifier outputs for arbitrary frequency modulations using Gauss–Chebyshev quadrature Open Access
   Dennis Lönard, Stefan Johansson, Alena Erlenbach, Jonas Gutsche, Artur Widera
   Rev. Sci. Instrum. 97, 094705 (2026)
   https://doi.org/10.1063/5.0340771
    

2025

1. Miniaturized magnetic-field sensor based on nitrogen-vacancy centers
   Stefan Johansson, Dennis Lönard, Isabel Cardoso Barbosa, Jonas Gutsche, Jonas Witzenrath, and Artur Widera
   Phys. Rev. Applied 24, 054078 (2025)
   https://doi.org/10.1103/lbqj-d5zv
    
2. Probing the fluctuating magnetic field of Fe-triazole spin-crossover thin-layers with nitrogen-vacancy centers in diamond
   Isabel Cardoso Barbosa, Tim Hochdörffer, Juliusz A. Wolny, Dennis Lönard, Stefan Johansson, Jonas Gutsche, Volker Schünemann, Artur Widera
   ACS Nano 19, 13, 12937–12947 (2025)
   https://pubs.acs.org/doi/10.1021/acsnano.4c16748
   Data: https://doi.org/10.5281/zenodo.14715400
    

2024

1. Temperature dependence of charge conversion during NV-center relaxometry in nanodiamond
   Isabel Cardoso Barbosa, Jonas Gutsche, Dennis Lönard, Stefan Dix, and Artur Widera
   Phys. Rev. Research 6, 023078 (2024)
   https://journals.aps.org/prresearch/abstract/10.1103/PhysRevResearch.6.023078
   Data: https://doi.org/10.5281/zenodo.8399526