Locally routing the exciton emissions in two-dimensional
(2D) transition-metal
dichalcogenides along different directions at the nanophotonic interface
is of great interest in exploiting the promising 2D excitonic systems
for functional nano-optical components. However, such control has
remained elusive. Herein we report on a facile plasmonic approach
for electrically controlled spatial modulation of the exciton emissions
in a WS2monolayer. The emission routing is enabled by
the resonance coupling between the WS2excitons and the
multipole plasmon modes in individual silver nanorods placed on a
WS2monolayer. Different from prior demonstrations, the
routing effect can be modulated by the doping level of the WS2monolayer, enabling electrical control. Our work takes advantage
of the high-quality plasmon modes supported by simple rod-shaped metal
nanocrystals for the angularly resolved manipulation of 2D exciton
emissions. Active control is achieved, which offers great opportunities
for the development of nanoscale light sources and nanophotonic devices.