Wide-angle and polarization insensitive and plasmonically induced transparency by planar metamaterial in the infrared regime

We present the design, characterization and experimental demonstration of a polarization insensitive and wide-angle plasmonically induced transparency (PIT) planar metamaterial (MM) in the near infrared regime. The experimental results show qualitative agreement with the simulated results. It proves that localized asymmetry leading to the plasmon-assisted interaction is the key to produce the PIT phenomenon in MMs, but it does not mean that the PIT phenomenon must depend on the polarization and the angle of incident waves. This kind of PIT planar MMs will help to overcome some of the limitations of customary designs demonstrated so far. Our work will offer a further step forward to the capability of optical modulation.