Maria Simanovskaia L&S Sciences
Investigations of Side Bands in Optically Detected Magnetic Resonance Signals of Negatively Charged Nitrogen Vacancy Centers in Diamond
Negatively charged nitrogen vacancy centers (NV- centers) in diamond consist of a nitrogen atom next to a vacancy in the carbon lattice. With their small size, these color centers promise magnetometry (measurement of the magnetic field) with an unprecedented combination of sensitivity and spatial resolution. For this application, optically detected magnetic resonance (ODMR) signals must be thoroughly understood. We obtain ODMR signals by focusing 532 nm (green) laser light onto the sample, applying a scan of microwave frequencies by pressing a wire against the diamond surface, and measuring the red fluorescence. ODMR signals enable probing the energy level structure of the NV- centers, from which the external magnetic field can be calculated. My SURF project attempts to determine the origin of certain recently observed side bands in ODMR signals of NV- centers. This knowledge is important for understanding ODMR line shapes and for optimization of NV based devices.