Abstract
AbstractVersatile nanoscale sensors that are susceptible to changes in a variety of physical quantities often exhibit limited selectivity. This paper reports a novel scheme based on microwave‐dressed spin states for optically probed nanoscale temperature detection using diamond quantum sensors, which provides selective sensitivity to temperature changes. By combining this scheme with a continuous pump–probe scheme using ensemble nitrogen‐vacancy centers in nanodiamonds, a sub‐microsecond temporal resolution with thermal sensitivity of 3.7 that is insensitive to variations in external magnetic fields on the order of 2 G is demonstrated. The presented results are favorable for the practical application of time‐resolved nanoscale quantum sensing, where temperature imaging is required under fluctuating magnetic fields.
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