Mid-Infrared Metaplasmonic Sensing

The significant mismatch between the long wavelengths of the mid-infrared and the length scales of many chemical, biological, and/or material elements results in weak light-matter interaction and is a significant obstacle for molecular sensing at the nanoscale. Here we demonstrate that metaplasmonic resonators, which extend true plasmonic response from the visible/near-infrared wavelength range to the mid-infrared via geometric dilution of thin noble metal films, enable strong mode confinement a