Chen, Y., Li, C., Yang, T., Ekimov, E. A., Bradac, C., Ha, S. T., Toth, M., Aharonovich, I., & Tran, T. T. (2023). Real-Time Ratiometric Optical Nanoscale Thermometry. ACS Nano, 17(3), 2725–2736. https://doi.org/10.1021/acsnano.2c10974
Abstract:
All-optical nanothermometry has become a
powerful, remote tool for measuring nanoscale temperatures
in applications ranging from medicine to nano-optics and solidstate
nanodevices. The key features of any candidate nanothermometer
are brightness, sensitivity, and (signal, spatial, and
temporal) resolution. Here, we demonstrate a real-time,
diamond-based nanothermometry technique with excellent
sensitivity (1.8% K−1) and record-high resolution (5.8 × 104
K Hz−1/2 W cm−2) based on codoped nanodiamonds. The
distinct performance of our approach stems from two factors:
(i) temperature sensorsnanodiamonds cohosting two group
IV color centersengineered to emit spectrally separated Stokes and anti-Stokes fluorescence signals under excitation by a
single laser source and (ii) a parallel detection scheme based on filtering optics and high-sensitivity photon counters for fast
readout. We demonstrate the performance of our method by monitoring temporal changes in the local temperature of a
microcircuit and a MoTe2 field-effect transistor. Our work advances a powerful, alternative strategy for time-resolved
temperature monitoring and mapping of micro-/nanoscale devices such as microfluidic channels, nanophotonic circuits, and
nanoelectronic devices, as well as complex biological environments such as tissues and cells.
License type:
Publisher Copyright
Funding Info:
This research / project is supported by the A*STAR - Young Individual Research Grant (YIRG)
Grant Reference no. : A2084c0177
This research / project is supported by the A*STAR - MTC Programmatic Fund
Grant Reference no. : M21J9b0085
Overseas Fundings: -
1) Australian Research Council (DE220100487, CE200100010, DP190101058)
2) Asian Office of Aerospace Research and Development (FA2386-20-1-4014)
3) Russian Science Foundation, Grant No. 19-12-00407
4) NSERC (RGPIN-2021-03059) and CFI JELF (#41173)