Abstract
We design a structure to achieve a function of polarization-independent multi-band unidirectional reflectionlessness in a non-Hermitian metamaterial system based on the Fabry-Pérot resonance. All contrast ratios of reflectance at 198 THz, 214.2 THz, and 232.65 THz are 0.99. The unidirectional reflectionless peak position remains almost unchanged with increasing polarization angles. Besides, the structure can also be used to realize the unidirectional reflectionless phenomenon in the incident angle range of 0–30[Formula: see text], which may provide great convenience for experimental operations.
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