Transverse excitation of plasmonic slot nano-resonators embedded in metal-coated plasmonic microfiber tips.

A plasmonic slot rectangular nano-resonator embedded in a metal-coated optical microfiber tip is theoretically and experimentally demonstrated. In this device, light is transversely coupled from the optical microfiber tip into the plasmonic slot nano-resonator, showing strong localization in three dimensions and strong enhancement factor (7.24 × 103). This device can find wide range of applications such as surface enhanced Raman scattering, optical filtering, spectroscopy, and bio-sensing. [ABSTRACT FROM AUTHOR]