Burning and graphitization of optically levitated nanodiamonds in vacuum

Scientific Reports
A T M A RahmanP Barker

Abstract

A nitrogen-vacancy (NV(-)) centre in a nanodiamond, levitated in high vacuum, has recently been proposed as a probe for demonstrating mesoscopic centre-of-mass superpositions and for testing quantum gravity. Here, we study the behaviour of optically levitated nanodiamonds containing NV(-) centres at sub-atmospheric pressures and show that while they burn in air, this can be prevented by replacing the air with nitrogen. However, in nitrogen the nanodiamonds graphitize below ≈10 mB. Exploiting the Brownian motion of a levitated nanodiamond, we extract its internal temperature (Ti) and find that it would be detrimental to the NV(-) centre's spin coherence time. These values of Ti make it clear that the diamond is not melting, contradicting a recent suggestion. Additionally, using the measured damping rate of a levitated nanoparticle at a given pressure, we propose a new way of determining its size.

References

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Citations

Jul 20, 2016·Nature Communications·Thai M HoangTongcang Li
Dec 12, 2019·Reports on Progress in Physics·James MillenA Nick Vamivakas
Jan 14, 2017·Physical Review Letters·Riccardo PennettaPhilip St J Russell
Mar 3, 2018·The Review of Scientific Instruments·A T M Anishur RahmanG W Morley
Aug 8, 2018·Physical Review Letters·Jonghoon AhnTongcang Li
Oct 16, 2016·Physical Review Letters·C WanM S Kim
Jul 3, 2021·Micromachines·Maxime PerdriatGabriel Hétet
Jul 31, 2021·Optics Letters·Danika R Luntz-MartinA Nick Vamivakas
Aug 29, 2019·ACS Omega·Laia GinésOliver A Williams

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Methods Mentioned

BETA
electron
dynamic light scattering
optical tweezer

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