'Plug-and-play' plasmonic metafibers for ultrafast fiber lasers

Integrating plasmonic metasurfaces on optical fiber tips forming so-called metafibers enriches the functionalities of an ordinary optical fiber, yielding a variety of advanced applications such as planar waveshaping, super-resolution imaging, and ultracompact sensing. However, to date, plasmonic metafibers have predominantly explored separate bare fibers, and little attention has been paid to their practical applications in nonlinear plasmonic regimes.