An infrared energy harvester based on radar cross-section reduction of chiral metasurfaces through phase cancellation approach.

ABSTRACT: Conventional metasurface absorbers rely on high dissipation losses by incorporating lossy materials. In this paper, we propose a novel mechanism of absorption based on phase cancellation of polarization states of scattered fields emerging from adjacent L-shaped chiral meta-atoms (unit cells). A linearly polarized wave forms helicoidal currents in each meta-atom leading to diagonally polarized radiated waves. When phase cancellation is employed by reorienting four such meta-atoms in a supercell configuration, contra-directed chiral currents flow in adjacent cells to cancel all the radiated fields in far-field region leading to a minimal broadside radar cross-section. From the reciprocity, the currents that are induced in the meta-atoms produce a null towards the incident direction which can

SUBMITTER: Amin M 

PROVIDER: S-EPMC8169907 | biostudies-literature | 2021 Jun

REPOSITORIES: biostudies-literature