Strong circular dichroism absorbers using chiral metamaterials with circular polarization

Yang, Hongyan; Sun, Hongrui; Yang, Yuhang; He, Quanlin; Gongli, Xiao; Wang, Bing; Shao, Liyang

doi:10.1016/j.optcom.2024.130403

Optics Communications

2024

DOI: 10.1016/j.optcom.2024.130403

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Strong circular dichroism absorbers using chiral metamaterials with circular polarization

Hongyan Yang,

Hongrui Sun,

Yuhang Yang

et al.

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2024

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Reconfigurable metasurface for circular dichroism and a polarization converter

Li,

Wang,

Xiong

2024

Opt. Mater. Express

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We propose a photosensitive silicon terahertz reconfigurable metasurface composed of a silicon substrate, a benzocyclobutene dielectric layer, a U-shaped silicon rod layer, and a metal open square ring layer. When the photosensitive silicon conductivity is σSi = 5 × 105 S/m, the metasurface exhibits strong circular dichroism under the incidence of a circularly polarized wave, with a circular dichroism (CD) value as high as 1 at frequency 4.03 THz. At this time, under linearly polarized wave incidence, the metasurface exhibits linear dichroism, with linear dichroism (LD) values of 0.71, -0.57, and 0.33 at frequencies of 6.76 THz, 7.45 THz, and 8.39 THz, respectively. While the photosensitive silicon conductivity is σSi = 5 × 104S/m, the metasurface displays a circular-circular polarization converter, and the polarization conversion rate (PCR) is more than 0.9 in the 2.92-6.04 THz and the 2.94-5.68 THz band.

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Reconfigurable metasurface for circular dichroism and a polarization converter

Li,

Wang,

Xiong

2024

Opt. Mater. Express

View full text Add to dashboard Cite

show abstract

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Strong circular dichroism absorbers using chiral metamaterials with circular polarization

Cited by 1 publication

References 49 publications

Reconfigurable metasurface for circular dichroism and a polarization converter

Reconfigurable metasurface for circular dichroism and a polarization converter

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