Journal
PHYSICAL REVIEW X
Volume 11, Issue 3, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevX.11.031038
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Funding
- Russian Foundation for Basic Research [20-02-00636]
- Russian Science Foundation [21-79-30038]
- Foundation for the Advancement of Theoretical Physics and Mathematics BASIS
- Russian Science Foundation [21-79-30038] Funding Source: Russian Science Foundation
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This study focuses on the properties of surface waves supported by anisotropic self-complementary metasurfaces, showing their hyperbolic structure and the possibility of switching wave canalization direction with a small frequency shift. It also reveals the inherent polarization degree of freedom in plane waves, opening up numerous opportunities for practical applications.
Self-complementary metasurfaces have gained significant attention due to their unique frequency-independent transmission and reflection properties and the possibility of the polarization transformation of plane waves. In this paper, we focus on the near-field spectrum to investigate, both theoretically and experimentally, the properties of surface waves supported by anisotropic self-complementary metasurfaces. We show that as a consequence of the electromagnetic Babinet's duality, such a structure is hyperbolic for any frequency. We demonstrate the possibility of switching the canalization direction of surface waves with ultimately flat phase fronts for 90 degrees by a very small frequency shift, paving the way to the extreme tunability and surface-wave routing. We reveal the polarization degree of freedom inherent to plane waves by demonstrating the all-frequency TE-TM polarization degeneracy of the surface waves along two principal directions. The results obtained open a plethora of opportunities for practical applications, including flat polarization devices, optical data-processing systems, sensing, holography and antennas.
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