Laboratoire Charles Coulomb UMR 5221 CNRS/UM2 (L2C)


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Thermal sensing at nanoscale using a single spin qubit

Encadrant : Isabelle PHILIP

par Christelle EVE - publié le

Scientific project :
In recent years, quantum sensing has attracted increasing attention thanks to its unprecedented combination of nanoscale mapping and non-invasively probing of very weak signals such as magnetic field or temperature. Such ability, out of reach with conventional sensors, has strong implications for fundamental physics in a wide range of fields, such as quantum mechanics, nanomagnetism, life science..., but also for industrial-scale applications like microelectronics....
One major breakthrough in this field has been the recent development of diamond-based quantum sensors as highly sensitive magnetic field sensors with nanometric spatial resolution [2-4]. Such probes exploit the quantum manipulation and read-out of the single spin state of a single atomic impurity in diamond : the nitrogen-vacancy center (NV center).
Scanning NV magnetometry

In addition to magnetic field imaging, the NV center-based probes also offer the potential for extraordinarily precise resolution of temperature with high spatial resolution [1]. The objective of the internship is to address this prospect, by implementing a novel sensing tool based on individual quantum defects in diamond for nanoscale thermal imaging. The first task will be to extend the coherent manipulation techniques of the single solid-state spins to measure local temperature gradients. This quantum sensor will then be applied to investigate novel thermal effects in plasmonic structures made of nanoscale gold assemblies, down to the single nanoparticle level.

This intership can be followed by a PhD work.

[1] G. Kucsko, et al., Nature 500, 54–58 (2013)

Relevant publications of the group :
[2] L. Rondin, et al., Nature Communications 4, 2279 (2013)
[3] J.-P. Tetienne et al., Science 344, 1366 (2014)
[4] J.-P. Tetienne et al., Nature Communications 6, 6733 (2015)

Encadrant :
Isabelle Robert-Philip –