Reprogrammable Spoof Plasmonic Modulator

摘要

Driven by increasing demands for the ultra-compact interconnects of integratedelectronics and the ultrafast information transfer of communicationsystems, research on spoof plasmonic metamaterials has attracted considerableattention. However, most efforts to date have been only achieved inindividual modulation of amplitude or phase at a single frequency becauseof the limitation of structural design. Herein, an ultra-thin reprogrammablemodulator consisting of a spoof surface plasmonic polariton (SSPP) waveguideand spoof localized surface plasmon (SLSP) resonators is proposedand experimentally demonstrated. It allows controlling the amplitudes andphases of surface waves independently. By simultaneously manipulating theSSPP waveguide and SLSP resonators in real time, different modulations arerealized in a programmable way, such as amplitude-shift keying, phase-shiftkeying, quadrature amplitude modulation, and frequency-shift keying. Measuredresults confirm that the reprogrammable plasmonic metamaterial canmodulate the surface electromagnetic waves, holding promising applicationsin integrated circuits and communication systems.