Ultra-sensitive hybrid diamond nanothermometer
- URL: http://arxiv.org/abs/1912.12097v1
- Date: Fri, 27 Dec 2019 13:50:01 GMT
- Title: Ultra-sensitive hybrid diamond nanothermometer
- Authors: Chu-Feng Liu, Weng-Hang Leong, Kangwei Xia, Xi Feng, Amit Finkler,
Andrej Denisenko, J\"org Wrachtrup, Quan Li and Ren-Bao Liu
- Abstract summary: Nitrogen-vacancy (NV) centers in diamond are promising quantum sensors for their long spin coherence time under ambient conditions.
A magnetic-nanoparticle-nanodiamond hybrid thermometer was demonstrated to have enhanced temperature sensitivity (11 mK Hz-1/2) [Phys. Rev. X 8, 011042], but the sensitivity was limited by the large spectral broadening of ensemble spins in nanodiamonds.
This hybrid design enabled detection of 2 millikelvins temperature changes with temporal resolution of 5 milliseconds.
- Score: 1.529783555466765
- License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
- Abstract: Nitrogen-vacancy (NV) centers in diamond are promising quantum sensors for
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, was demonstrated to have enhanced temperature sensitivity (11 mK
Hz^{-1/2}) [Phys. Rev. X 8, 011042 (2018)], but the sensitivity was limited by
the large spectral broadening of ensemble spins in nanodiamonds. To overcome
this limitation, here we showed 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 demonstrated a temperature sensitivity
of 76 uK Hz^{-1/2}. This hybrid design enabled detection of 2 millikelvins
temperature changes with temporal resolution of 5 milliseconds. The
ultra-sensitive nanothermometer offers a new tool to investigate thermal
processes in nanoscale systems.
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