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(a) Schematic view of the switchable metamaterial reflector/absorber. (b) The fabricated sample. The dashed blue square indicates one unit cell with four ELCs.
(a) Measured reflection under normal incidence at different forward bias voltages (indicated in the inset). (b) Surface current density distribution on ELCs at peak absorption frequency for one particular polarization.
Simulated (solid) and measured (dashed) reflection for normal incident waves with electric field polarized along (a) axis and (b) axis under different diode states.
Measured reflection under oblique incidence for (a) TE mode (electric field in the plane of the absorber) and (b) TM mode (magnetic field in the plane of the absorber).
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