  While experiments with one or two quantum emitters have become routine in
various laboratories, scalable platforms for efficient optical coupling of many
quantum systems remain elusive. To address this issue, we report on chip-based
systems made of one-dimensional subwavelength dielectric waveguides
(nanoguides) and polycyclic aromatic hydrocarbon molecules. After discussing
the design and fabrication requirements, we present data on coherent linear and
nonlinear spectroscopy of single molecules coupled to a nanoguide mode. Our
results show that external microelectrodes as well as optical beams can be used
to switch the propagation of light in a nanoguide via the Stark effect and a
nonlinear optical process, respectively. The presented nanoguide architecture
paves the way for the investigation of many-body phenomena and polaritonic
states and can be readily extended to more complex geometries for the
realization of quantum integrated photonic circuits.
