Dual-mode metamaterial design enabling quasi-broadband invisibility cloaking and retroreflection (IMAGE)

Science China Press

Dual-mode metamaterial design enabling quasi-broadband invisibility cloaking and retroreflection

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(a) Schematic of the dual-mode metamaterial design. The structure employs PEC slot cavities filled with conventional dielectrics, exhibiting dual operational modes:  omnidirectional multiband performance at Fabry-Pérot resonance frequencies, and unidirectional broadband functionality via Brewster-effect transmission. The right panel illustrates the transformation invariance achieved by cascaded impedance-matched metallic slot cavities. (b) Experimental validation of quasi-broadband cloaking performance. (c) Experimental characterization of quasi-broadband retroreflection.

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