Graphene as a tunable THz reservoir for shaping the Mollow triplet of an artificial atom via plasmonic effects
(Received 29 April 2014; revised manuscript received 30 June 2014; published 12 August 2014)Using a realistic quantum master equation, we show that the resonance ﬂuorescence spectra of a two-levelartiﬁcialatom(quantumdot)canbetunedbyadjustingitsphotoniclocaldensityofstatesviabiasingoneormoregraphene monolayers. The structured photon reservoir is included using a photon Green function theory whichfully accounts for the loss and dispersion. The ﬁeld-driven Mollow triplet spectrum can be actively controlled bythe graphene bias in the THz frequency regime. We also consider the effect of a dielectric support environmentand multiple graphene layers on the emitted ﬂuorescence. Finally, thermal bath effects are considered and areshown to be important for low THz frequencies.DOI: 10.1103/PhysRevB.90.085414 PACS number(s): 78