Nanoelectronics Nanophotonic Magnetometry
The “Ultrafast Bio- and Nanophotonics” group is going to develop an ultrasensitive magnetic field sensor for the static and dynamic characterization of nanoscale magnetic fields, e.g. for the field characterization of magnetic nanostructures and/or biological samples. The approach is based on optically detected magnetic resonance (ODMR).
Illustration of the optically detected magnetic resonance (ODMR) method. Color centers in diamond are very stable reporters of the local magnetic field. When tuning a radiofrequency source through the triplet state resonances of such color center, the Zeeman splitting becomes apparent as two fluorescence intensity dips. The frequency splitting of these dips is directly related to the local magnetic field. At very short distances between the color center and a local magnetic field source the sensitivity allows the detection of fields produced by a single electron spin.
“Nitrogen-Vacancy Centers in Diamond: Nanoscale Sensors for Physics and Biology”, R. Schirhagl, K. Chang, M. Loretz, and C. L. Degen, Annu. Rev. Phys. Chem. 2014. 65:83–105
“Magnetometry with nitrogen-vacancy defects in diamond”, L. Rondin, J.-P. Tetienne,T. Hingant,J.-F. Roch,P. Maletinsky and V. Jacques, arXiv:1311.5214v2