Collective single-mode precession of electron spins in an ensemble of singly charged (In,Ga)As/GaAs quantum dots
A. Greilich, S. Spatzek, I.A. Yugova, I.A. Akimov, D.R. Yakovlev, A.L. Efros, D. Reuter, A.D. Wieck, M. Bayer, Physical Review B (2009).