  We report on coupling between semiconducting single-wall carbon nanotubes
(s-SWNT) photoluminescence and silicon microring resonators. Polyfluorene
extracted s-SWNT deposited on such resonators exhibit sharp emission peaks, due
to interaction with the cavity modes of the microring resonators. Ring
resonators with radius of 5 {\mu}m and 10 {\mu}m were used, reaching quality
factors up to 4000 in emission. These are among the highest values reported for
carbon nanotubes coupled with an integrated cavity on silicon platform, which
open up the possibility to build s-SWNT based efficient light source on
silicon.
