2019/10/31 by Xuchen Wang, Ana Díaz-Rubio, Ana Diaz-Rubio +4 · 2 citations
Engineering · Materials Science · Physics and Astronomy · #Advanced Antenna and Metasurface Technologies #Advanced Wireless Communication Technologies #Dielectric #Electrical impedance #Evanescent wave #Excitation #Metamaterials and Metasurfaces Applications #Reciprocal #Variety (cybernetics) #physics.app-ph #physics.optics
paper · pdf · doi:10.1103/physrevapplied.13.044040
published as Phys. Rev. Applied 13, 044040 (2020)
openalex created_date 2019/11/01 · openalex publication_date 2020/04/15 · arxiv created 2020/11/20 · arxiv updated 2020/11/23 · openalex updated_date 2026/08/05
Integrating multiple functionalities into a single metasurface is becoming of great interest for future intelligent communication systems. While such devices have been extensively explored for reciprocal functionalities, in this work, we integrate a wide variety of nonreciprocal applications into a single platform. The proposed structure is based on spatiotemporally modulated impedance sheets supported by a grounded dielectric substrate. We show that, by engineering the excitation of evanescent modes, nonreciprocal interactions with impinging waves can be configured at will. We demonstrate a plethora of nonreciprocal components, such as wave isolators, phase shifters, and circulators, on the same metasurface. This platform allows switching between different functionalities by modifying only the pumping signals (harmonic or nonharmonic), without changing the main body of the metasurface structure. This solution opens the door for future real-time reconfigurable and environment-adaptive nonreciprocal wave controllers.