FIB lithography of nanoporous gold slits for extraordinary transmission

There is a growing interest in discovering new materials for sensing purposes that provide better sensitivity and efficiency. Thanks to a greatly enhanced surface-to-volume ratio, nanoporous gold reveals benefits for better reaction efficiency and detection sensitivity purposes. Moreover plasmonic properties in the near-IR range assure employment in plasmonic devices. Here we present our work of design, fabrication and characterization of nanoporous gold slit arrays that support the phenomenon of extraordinary transmission of the incident light. The gold surface of fabricated samples has been coated with dodecanethiol and the optical response to functionalization has been analyzed in zero-order transmission.