All-dielectric reflective half-wave plate metasurface based on the anisotropic excitation of electric and magnetic dipole resonances

Research output: Contribution to journalArticle

Authors

Colleges, School and Institutes

Abstract

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.

Details

Original languageEnglish
Article number4
Pages (from-to)911-914
Number of pages4
JournalOptics Letters
Volume43
Issue number4
Early online date22 Jan 2018
Publication statusPublished - 15 Feb 2018

Keywords

  • Metamaterial, Dielectric