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Electron spin contrast of Purcell-enhanced nitrogen-vacancy ensembles in nanodiamonds

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arxiv 1703.06991 v1 pith:RX5RQNAR submitted 2017-03-20 cond-mat.mes-hall

Electron spin contrast of Purcell-enhanced nitrogen-vacancy ensembles in nanodiamonds

Simeon Bogdanov , Mikhail Y. Shalaginov , Alexey Akimov , Alexei S. Lagutchev , Polina Kapitanova , Jing Liu , Dewan Woods , Marcello Ferrera
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Pavel Belov Joseph Irudayaraj Alexandra Boltasseva Vladimir M. Shalaev
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classification cond-mat.mes-hall
keywords spincontrastensemblesnitrogen-vacancymethodadvancesallowbring
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Nitrogen-vacancy centers in diamond allow for coherent spin state manipulation at room temperature, which could bring dramatic advances to nanoscale sensing and quantum information technology. We introduce a novel method for the optical measurement of the spin contrast in dense nitrogen-vacancy (NV) ensembles. This method brings a new insight into the interplay between the spin contrast and fluorescence lifetime. We show that for improving the spin readout sensitivity in NV ensembles, one should aim at modifying the far field radiation pattern rather than enhancing the emission rate.

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