Full-Stokes Polarization Perfect Absorption with Diatomic Metasurfaces

Yao Liang, Han Lin, Kirill Koshelev, Fengchun Zhang, Yunyi Yang, Jiayang Wu, Yuri Kivshar*, Baohua Jia

*Corresponding author for this work

    Research output: Contribution to journalArticlepeer-review

    95 Citations (Scopus)

    Abstract

    Metamaterial-based perfect absorbers provide efficient ways for selective absorption of light with both linear or circular polarizations. Perfect absorption for an arbitrary polarization requires the development of subwavelength structures absorbing efficiently elliptically polarized light, but they remain largely unexplored. Here, we design and realize experimentally novel plasmonic metasurfaces for full-Stokes polarization perfect absorption in the mid-infrared. The metasurface unit cell consists of coupled anisotropic meta-atoms forming a diatomic metamolecule. The designed plasmonic metastructures provide a strong field enhancement by at least 1 order of magnitude higher than conventional perfect absorbers. In experiment, our plasmonic metasurfaces demonstrate sharp differentiation of spectral responses for an arbitrary pair of orthogonal polarization states (linear, circular, or elliptical) providing perfect absorption for one polarization with strong reflection for its counterpart. Our results suggest a novel route for efficient control of light polarization in metasurfaces offering numerous potential applications ranging from thermal imaging to chiral molecule detection.

    Original languageEnglish
    Pages (from-to)1090-1095
    Number of pages6
    JournalNano Letters
    Volume21
    Issue number2
    DOIs
    Publication statusPublished - 27 Jan 2021

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