  Atomically-thin black phosphorus (BP) is an emerging two dimensional (2D)
material exhibiting bright photoluminescence in the near infrared. Coupling its
radiation to photonic nanostructures will be an important step toward the
realization of 2D material based nanophotonic devices that operate efficiently
in the near infrared, which includes the technologically important optical
telecommunication wavelength bands. In this letter, we demonstrate the optical
coupling between atomically-thin BP and a 2D photonic crystal nanocavity. We
employed a home-build dry transfer apparatus for placing a thin BP flake on the
surface of the nanocavity. Their optical coupling was analyzed through
measuring cavity mode emission under optical carrier injection at room
temperature.
