All-optical thermometry and thermal properties of the optically detected spin resonances of the NV- center in nanodiamond

The negatively charged nitrogen-vacancy (NV-) center in diamond is at the frontier of quantum nanometrology and biosensing. Recent attention has focused on the application of high-sensitivity thermometry using the spin resonances of NV- centers in nanodiamond to subcellular biological and biomedical research. Here, we report a comprehensive investigation of the thermal properties of the center's spin resonances and demonstrate an alternate all-optical NV- thermometry technique that exploits the temperature dependence of the center's optical Debye-Waller factor.