Polarization-controlled generation of Airy plasmons.

Plasmonic metasurfaces have shown great potential to generate Airy plasmons on a metal surface, but the building block of metasurfaces in these works is purposely designed to operate under limited polarization states for the incident light. Here, it is shown that paired nanoslit resonators on a metal surface can provide Airy phase distributions under different polarization incidences. We demonstrate that Airy plasmons can be generated under x-, y-, left-handed circular, and right-handed circular polarization incidences by adjusting the orientation angles of the paired nanoslit resonators. Analogous to previous proposals, Airy plasmons exhibit remarkable non-diffraction, self-healing, and autofocusing properties in the present configuration. The presented design scheme suggests promising applications in polarization-controlled plasmonic circuits and surface optical manipulation.