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(a) An element of the designed switchable metamaterial under oblique incidence; (b) cross section of the element; top view of two elements in (c) the CLOSE-state and (d) the OPEN-state of the switchable metamaterial; side view of two unit elements in (e) TM polarization and (f) TE polarization.
Reflection spectra of the switchable metamaterial under θ of 45° when (a) Φ = 0° and (b) Φ = 90° in TE polarization. Solid line: CLOSE-state spectra R CLOSE; dashed line: OPEN-state spectra R OPEN; dotted line: reflection relative ratio ΔR r.
Electric current on the metamaterial element in the CLOSE-state and OPEN state at (a) and (d) 0.74 THz when Φ is 0°, (b) and (e) 0.74 THz when Φ is 90°, (c) and (f) at 1.16 THz when Φ is 0°.
Calculated reflection spectra of the switchable metamaterial at (a) Φ = 0° and (b) Φ = 90° in TM polarization. Solid line: CLOSE-state at θ = 0°; dashed line: CLOSE-state at θ = 45° (solid); dotted line: OPEN-state at θ = 45°.
SEM images of (a) metamaterial structure, (b) single element, and (c) micromachined actuator.
The reflection spectra under TE polarization in the CLOSE-state (dash) and the OPEN-state (solid) of the metamaterial when (a) Φ is 0° and (b) Φ is 90°. Dotted line: the reflection relative ratio ΔR r.
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