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

Simeon Bogdanov, Mikhail Y. Shalaginov, A. Akimov, A. S. Lagutchev, Polina Kapitanova, J. Liu, Dewan Woods, Marcello Ferrera, Pavel Belov, Joseph Irudayaraj, Alexandra Boltasseva, Vladimir M. Shalaev

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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 method for the optical measurement of the spin contrast in dense nitrogen-vacancy (NV) ensembles. This method brings 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.
Original languageEnglish
Article number035146
JournalPhysical Review B
Issue number3
Publication statusPublished - 25 Jul 2017


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