Manipulation of quenching in nanoantenna-emitter systems enabled by external detuned cavities: a path to enhance strong-coupling
Strong light-matter interactions at the single emitter-level have been so far achieved via narrowband cavities with very high quality factors (Q) or via plasmonic nanoantennas at the cost of significant radiation quenching in the metal. In this work, we propose an unexplored mechanism for manipulating quenching channels of a single emitter and accessing the strong coupling regime based on a broadband interaction between a low-Q Fabry-Perot cavity and an off-resonant nanoantenna. Interestingly, we show that one can remotely suppress the quenching channels with the cavity, although these are commonly attributed as an intrinsic property of an emitter in extreme proximity to metals. We further demonstrate how such radiative cooperative enhancement can enable the strong coupling to the single emitter even when each photonic structure alone cannot access this regime. The coupling of tunable broadband cavities with plasmonic nanostructures applied opens new avenues of research in the fundamental photophysics of plasmonic systems as well as technological advances in nanophotonics.
B. Gurlek, V. Sandoghdar and D. Martin-Cano
ACS Photonics (2017)
@SandoghdarLab
