Nonlocal effects in double fishnet metasurfaces nanostructured at deep subwavelength level as a path toward simultaneous sensing of multiple chemical analytes

- Nonlocal effects are used to tailor the response of aperture-based plasmonic sensors.
- The geometry of nanoholes is modified at the deep subwavelength level.
- Metamaterial fishnet structure is tailored to create new optical modes.
- The obtained unit cell superstructure has multiple tailorable spectral peaks.
- The structure is convenient for multianalyte sensing by a single structure.