  Strong light-matter interaction and high-efficiency optical collection of
fluorescence from quantum emitters are crucial topics in quantum and
nanophotonic fields. High-quality cavities, dispersive photonic crystal
waveguides and even plasmonic structures have been used to enhance the
interaction with quantum emitters, thus realize efficient collection of the
fluorescence. In this work, a new method is proposed to collect the
fluorescence of quantum dots (QDs) with a fiber-integrated multimode silver
nanowire (AgNW) waveguide. Fluorescence lifetime measurement is performed to
investigate the coupling between QDs and different plasmonic modes. Compared
with far-field collection method, the AgNW-fiber probe can realize near-unity
collection efficiency theoretically. This fiber-integrated plasmonic probe may
be useful in the area of nanophotonics and also promising for quantum
information devices.
