Broadband transparent chiral mirrors: Design methodology and bandwidth analysis

Wending Mai, Danny Zhu, Zheng Gong, Xiaoyou Lin, Yifan Chen, Jun Hu, Douglas Henry Werner

Research output: Contribution to journalArticle

Abstract

Chiral mirrors are a class of metamaterials that reflect circularly polarized light of a certain helicity in a handedness-preserving manner, while absorbing circular polarization of the opposite handedness. However, most absorbing chiral mirrors operate only in a narrow frequency band, as limited by the causality principle. Instead of absorbing the undesired waveform, here we propose a transparent chiral mirror that allows undesired waves to pass through. In particular, the handedness-preserving band of the transparent chiral mirror is free of the causality limit, thus enabling broadband functionality. Furthermore, since electromagnetic waves outside the handedness-preserving band may transmit through the proposed chiral mirror, the reflected wave contains only circular polarization components of a certain handedness over a wide frequency range, which is favored in many applications. Moreover, the scheme is lossless and scalable. To realize the proposed transparent chiral mirror, we apply an array of helical microstructures in a two-dimensional square lattice. Traditionally, this kind of structure has been used as a circular polarizer but we apply it instead in a reflective mode. Our work provides a bandwidth analysis of chiral mirrors, and paves the way to new opportunities for creating broadband chiral metamaterials with handedness-preserving properties.

Original languageEnglish (US)
Article number045305
JournalAIP Advances
Volume9
Issue number4
DOIs
StatePublished - Apr 1 2019

Fingerprint

handedness
methodology
mirrors
broadband
bandwidth
preserving
circular polarization
reflected waves
polarizers
polarized light
electromagnetic radiation
waveforms
frequency ranges
microstructure

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

Cite this

Mai, Wending ; Zhu, Danny ; Gong, Zheng ; Lin, Xiaoyou ; Chen, Yifan ; Hu, Jun ; Werner, Douglas Henry. / Broadband transparent chiral mirrors : Design methodology and bandwidth analysis. In: AIP Advances. 2019 ; Vol. 9, No. 4.
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Broadband transparent chiral mirrors : Design methodology and bandwidth analysis. / Mai, Wending; Zhu, Danny; Gong, Zheng; Lin, Xiaoyou; Chen, Yifan; Hu, Jun; Werner, Douglas Henry.

In: AIP Advances, Vol. 9, No. 4, 045305, 01.04.2019.

Research output: Contribution to journalArticle

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