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