Konzelmann, Philipp Rendler, Torsten Bergholm, Ville Zappe, Andrea Pfannenstill, Veronika Garsi, Marwa Ziem, Florestan Niethammer, Matthias Widmann, Matthias Lee, Sang-Yun Neumann, Philipp Wrachtrup, Joerg 2024-01-19T21:04:06Z 2024-01-19T21:04:06Z 2021-09-05 2018-12-14 1367-2630 https://pubs.kist.re.kr/handle/201004/120573 We present an optimized scheme for nanoscale measurements of temperature in a complex environment using the nitrogen-vacancy center in nanodiamonds (NDs). To this end we combine a Ramsey measurement for temperature determination with advanced optimal control theory. We test our new design on single nitrogen-vacancy centers in bulk diamond and fixed NDs, achieving better readout signal than with common soft or hard microwave control pulses. We demonstrate temperature readout using rotating NDs in an agarose matrix. Our method opens the way to measure temperature fluctuations in complex biological environment. The used principle is universal and not restricted to temperature sensing. English IOP PUBLISHING LTD NITROGEN-VACANCY CENTERS THERMOMETRY FLUORESCENCE Robust and efficient quantum optimal control of spin probes in a complex (biological) environment. Towards sensing of fast temperature fluctuations Article 10.1088/1367-2630/aaf315 1 NEW JOURNAL OF PHYSICS, v.20 NEW JOURNAL OF PHYSICS 20 scie scopus 000453517300006 2-s2.0-85059884254 Physics, Multidisciplinary Physics Article NITROGEN-VACANCY CENTERS THERMOMETRY FLUORESCENCE optimal control temperature measurement nanodiamonds quantum sensing