All-dielectric reflective half-wave plate metasurface based on the anisotropic excitation of electric and magnetic dipole resonances
Research output: Contribution to journal › Article › peer-review
Colleges, School and Institutes
We present an all-dielectric metasurface that simultaneously supports electric and magnetic dipole resonances for orthogonal polarizations. At resonances, the metasurface reflects the incident light with nearly perfect efficiency and provides a phase difference of 휋 in the two axes, making a low-loss half-wave plate in reflection mode. The polarization handedness of the incident circularly polarized light is preserved after reflection; this is different from either a pure electric mirror or magnetic mirror. With the features of high reflection and circular polarization conservation, the metamirror is an ideal platform for the geometric phase-based gradient metasurface functioning in reflection mode. Anomalous reflection with the planar meta-mirror is demonstrated as a proof of concept. The proposed meta-mirror can be a good alternative to plasmonic metasurfaces for future compact and high-efficiency metadevices for polarization and phase manipulation in reflection mode.
|Number of pages||4|
|Early online date||22 Jan 2018|
|Publication status||Published - 15 Feb 2018|
- Metamaterial, Dielectric