Integrated nanophotonics based on wire plasmons and atomically-thin   material
  Photonic integrated circuits are an enabling technology in modern communications systems. The continually increasing demands for higher-speed and lower operating power devices have resulted in the continued impetus to shrink photonic components. In this work, we demonstrate a primitive nanophotonic integrated circuit element composed of a single silver nanowire and single-layer molybdenum disulfide (MoS2) flake. We show that nanowire plasmons can excite MoS2 photoluminescence via direct plasmon-to-exciton conversion along the wire and plasmon-to-photon-to-exciton conversion at the MoS2-covered wire end. We also find that the reverse process is possible: MoS2 excitons can decay into nanowire plasmons that can then be routed via the nanowire on-chip. Finally, we demonstrate that the nanowire may serve the dual purpose of both exciting MoS2 photoluminescence via plasmons and recollecting the decaying excitons. 
Kenneth M. Goodfellow, Ryan Beams, Chitraleema Chakraborty, Lukas   Novotny, and A. Nick Vamivakas
cond-mat.mes-hall physics.optics