Graphene-based hybrid metal chiral metasurface for dynamic optical circular dichroism

Roy, Shuvajit; Mondal, Souvik; Debnath, Kapil

doi:10.1364/fio.2022.jw4b.35

Cited by 1 publication

(1 citation statement)

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“…Compared to the 3D helical structures and multi-layer stacking structures, this fabrication process of the single layer metamaterial was much simpler ignoring the rather low CD. Roy et al [31] proposed a planar hybrid graphene metal metamaterial, and achieved a CD of 0.75 at a wavelength of 760 nm by tuning the chemical potential of graphene. In summary, they designed metamaterials of different shapes and obtained a certain CD in the visible light range under their respective conditions.…”

Section: Resultsmentioning

confidence: 99%

High transmission of circularly polarized light and circular dichroism with all-dielectric metamaterial

Du,

Chen,

Zhang

et al. 2024

J. Opt.

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The optical chirality of metamaterials gives birth to distinct responses of left (LCP) and right (RCP) circularly polarized light, leading to asymmetric transmission and circular dichroism (CD) of circularly polarized light. In this work, meta-atom structure composed of square and semicircular combinations were designed, which exhibits extreme high ratio of transmission, reflection and CD values in blue light range. In compare to other reported structures, the structure composed of semicircular and square combinations can achieve better asymmetric transmission. At the wavelength of 460 nm, the incident LCP light can be mostly converted to RCP light, and the incident RCP light can be almost completely reflected. Furthermore, the geometric phase can be controlled by designing the orientation angle of the meta-atom, and the metamaterial can function under any linear or circular polarization and achieving the regulation of the light field. The designed metamaterial provides promising insights into the high CD and possible applications in optical integrated devices, such as anomalously refracted, focusing, and holograms, etc.

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Section: Resultsmentioning

confidence: 99%

High transmission of circularly polarized light and circular dichroism with all-dielectric metamaterial

Du,

Chen,

Zhang

et al. 2024

J. Opt.

View full text Add to dashboard Cite

show abstract

Graphene-based hybrid metal chiral metasurface for dynamic optical circular dichroism

Abstract: A graphene-based hybrid metal chiral metasurface has been proposed. By tuning the chemical potential of graphene, circular dichroism of 75% has been achieved. Various doping levels allow a flexible tuning of circular dichroism efficiency.

Cited by 1 publication

References 2 publications

High transmission of circularly polarized light and circular dichroism with all-dielectric metamaterial

High transmission of circularly polarized light and circular dichroism with all-dielectric metamaterial

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