Versatile 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 K⋅Hz−1/2 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.
@article{arxiv.2105.03628,
title = {Temperature selective thermometry with sub-microsecond time resolution using dressed-spin states in diamond},
author = {Jiwon Yun and Kiho Kim and Sungjoon Park and Dohun Kim},
journal= {arXiv preprint arXiv:2105.03628},
year = {2021}
}