Surface-wave coupling in double Floquet sheets supporting phased temporal Wood anomalies.

ABSTRACT: We investigate symmetry-selective surface-mode excitation in a general periodically time-modulated double-layer system, where the modulation of the two layers has a constant phase difference. By deriving a semi-analytic transfer matrix formalism of a Drude-dispersive double-layer structure with periodic time-modulation, we calculate the scattering amplitudes and the corresponding transmission coefficient. Our results show that the phase-difference between the modulation of the two sheets plays an essential role in significantly enhancing and selectively exciting either the even or odd surface mode with high efficiency. We verify our calculations with full-wave time-domain simulations, showing that efficient switching between the surface-wave excitation of the two distinct modal channels ca

SUBMITTER: Tsai YW 

PROVIDER: S-EPMC11501648 | biostudies-literature | 2022 Aug

REPOSITORIES: biostudies-literature