Nitrogen-vacancy (NV) centers in diamond are promising quantum sensors because of their long spin coherence time under ambient conditions. However, their spin resonances are relatively insensitive to non-magnetic parameters such as temperature. A magnetic-nanoparticle-nanodiamond hybrid thermometer, where the temperature change is converted to the magnetic field variation near the Curie temperature, were demonstrated to have enhanced temperature sensitivity (11 mK Hz(-1/2)) (Wang N, Liu G-Q and LeongW-H et al. Phys Rev X 2018; 8: 011042), but the sensitivity was limited by the large spectral broadening of ensemble spins in nanodiamonds. To overcome this limitation, here we show an improved design of a hybrid nanothermometer using a single NV center in a diamond nanopillar coupled with a single magnetic nanoparticle of copper-nickel alloy, and demonstrate a temperature sensitivity of 76 mu K Hz(-1/2). This hybrid design enables detection of 2 mK temperature changes with temporal resolution of 5 ms. The ultra-sensitive nanothermometer offers a new tool to investigate thermal processes in nanoscale systems.
%0 Journal Article
%1 liu2021ultrasensitive
%A Liu, C. F.
%A Leong, W. H.
%A Xia, K. W.
%A Feng, X.
%A Finkler, A.
%A Denisenko, A.
%A Wrachtrup, J.
%A Li, Q.
%A Liu, R. B.
%B National Science Review
%D 2021
%K nano-thermometry
%R 10.1093/nsr/nwaa194
%T Ultra-sensitive hybrid diamond nanothermometer
%U https://academic.oup.com/nsr/article/8/5/nwaa194/5898677
%V 8
%X Nitrogen-vacancy (NV) centers in diamond are promising quantum sensors because of their long spin coherence time under ambient conditions. However, their spin resonances are relatively insensitive to non-magnetic parameters such as temperature. A magnetic-nanoparticle-nanodiamond hybrid thermometer, where the temperature change is converted to the magnetic field variation near the Curie temperature, were demonstrated to have enhanced temperature sensitivity (11 mK Hz(-1/2)) (Wang N, Liu G-Q and LeongW-H et al. Phys Rev X 2018; 8: 011042), but the sensitivity was limited by the large spectral broadening of ensemble spins in nanodiamonds. To overcome this limitation, here we show an improved design of a hybrid nanothermometer using a single NV center in a diamond nanopillar coupled with a single magnetic nanoparticle of copper-nickel alloy, and demonstrate a temperature sensitivity of 76 mu K Hz(-1/2). This hybrid design enables detection of 2 mK temperature changes with temporal resolution of 5 ms. The ultra-sensitive nanothermometer offers a new tool to investigate thermal processes in nanoscale systems.
@article{liu2021ultrasensitive,
abstract = {Nitrogen-vacancy (NV) centers in diamond are promising quantum sensors because of their long spin coherence time under ambient conditions. However, their spin resonances are relatively insensitive to non-magnetic parameters such as temperature. A magnetic-nanoparticle-nanodiamond hybrid thermometer, where the temperature change is converted to the magnetic field variation near the Curie temperature, were demonstrated to have enhanced temperature sensitivity (11 mK Hz(-1/2)) (Wang N, Liu G-Q and LeongW-H et al. Phys Rev X 2018; 8: 011042), but the sensitivity was limited by the large spectral broadening of ensemble spins in nanodiamonds. To overcome this limitation, here we show an improved design of a hybrid nanothermometer using a single NV center in a diamond nanopillar coupled with a single magnetic nanoparticle of copper-nickel alloy, and demonstrate a temperature sensitivity of 76 mu K Hz(-1/2). This hybrid design enables detection of 2 mK temperature changes with temporal resolution of 5 ms. The ultra-sensitive nanothermometer offers a new tool to investigate thermal processes in nanoscale systems.
},
added-at = {2021-06-21T10:28:12.000+0200},
author = {Liu, C. F. and Leong, W. H. and Xia, K. W. and Feng, X. and Finkler, A. and Denisenko, A. and Wrachtrup, J. and Li, Q. and Liu, R. B.},
biburl = {https://puma.ub.uni-stuttgart.de/bibtex/252231073ccefecfa83c616becbf09555/shirschmann},
booktitle = {National Science Review},
doi = {10.1093/nsr/nwaa194},
interhash = {3cb0a399141e7d7479627d60179a09a1},
intrahash = {52231073ccefecfa83c616becbf09555},
issn = {2095-5138},
keywords = {nano-thermometry},
series = 5,
timestamp = {2021-06-21T08:28:12.000+0200},
title = {Ultra-sensitive hybrid diamond nanothermometer},
url = {https://academic.oup.com/nsr/article/8/5/nwaa194/5898677},
volume = 8,
year = 2021
}
