Abstract
Metamaterials with tailored electromagnetic properties hold great promise for the manipulation of electromagnetic waves. Here, we propose an intriguing off-resonance meta-device to control the polarization states and dispersive features of the electromagnetic waves simultaneously. The proposed meta-device is composed of stacks of bilayer gear-like metallic patterns, which exhibit significant anisotropy due to the geometric asymmetry. The results show that the considered meta-device operates in a transmission mode and can achieve broadband and nondispersive cross-polarization transmission with a high polarization conversion ratio nearly 100% for both of the normal incident linear and circular polarization waves. Moreover, the broadband and efficient polarization conversion behavior of the meta-device can be maintained regardless of the incident angle for the circular polarization waves. These fascinating performances enable the meta-device to act as an excellent half-wave plate being greatly beneficial for polarization manipulation.
Published Version
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