Multi-band terahertz chiral metasurface with giant optical activities and negative refractive index based on <i>T</i>-shaped resonators

Chen, Hao Ran; Cheng, Yong; Zhao, Jing; Mao, Xue

doi:10.1142/s0217984918503669

Cited by 13 publications

(8 citation statements)

References 44 publications

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“…The CMSs have received tremendous interest since it could exhibit exotic EM properties including negative refractive index and optical activity [ 11 , 12 ], asymmetric transmission [ 13 , 14 ], giant CD effect [ 15 – 17 ], polarization conversion [ 18 , 19 ], and wave front manipulation [ 20 , 21 ] etc. Since then, various CMSs structures (such as split-ring, spiral wire, gammadion, L-shaped and so on) have been successively proposed to achieve highly-efficient chiral-selective field enhancement for LCP or RCP light [ 22 – 33 ].…”

Section: Introductionmentioning

confidence: 99%

Plasmonic Chiral Metasurface Absorber Based on Bilayer Fourfold Twisted Semicircle Nanostructure at Optical Frequency

2021

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In this paper, we present a plasmonic chiral metasurface absorber (CMSA), which can achieve high selective absorption for right-handed and left-handed circular polarization (RCP, “+”, and LCP, “−”) lights at optical frequency. The CMSA is composed of a dielectric substrate sandwiched with bi-layer fourfold twisted semicircle metal nanostructure. The proposed CMSA has a strong selective absorption band, where absorption peaks for LCP and RCP lights occur at different resonance frequencies, reflecting the existence of a significant circular dichroism (CD) effect. It is shown that the absorbance of the CMSA can reach to 93.2% for LCP light and 91.6% for RCP light, and the maximum CD magnitude is up to 0.85 and 0.91 around 288.5 THz and 404 THz, respectively. The mechanism of the strong chiroptical response of the CMSA is illustrated by electric fields distributions of the unit-cell nanostructure. Furthermore, the influence of the geometry of the proposed CMSA on the circular polarization selective absorption characterization is studied systematically.

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Section: Introductionmentioning

confidence: 99%

Plasmonic Chiral Metasurface Absorber Based on Bilayer Fourfold Twisted Semicircle Nanostructure at Optical Frequency

2021

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“…The CMSs have received tremendous interest since it could exhibit exotic EM properties including negative refractive index and optical activity [11,12], asymmetric transmission [13,14], giant CD effect [15][16][17], polarization conversion [18,19], and wave front manipulation [20,21] etc. Since then, various CMSs structures (such as split-ring, spiral wire, gammadion, L-shaped and so on) have been successively proposed to achieve highly-e cient chiral-selective eld enhancement for LCP or RCP light [22][23][24][25][26][27][28][29][30][31][32][33].…”

Section: Introductionmentioning

confidence: 99%

Plasmonic chiral metasurface absorber based on bilayer fourfold twisted semicircle nanostructure at optical frequency

Cheng

Chen

Luo

2020

Preprint

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In this paper, we present a plasmonic chiral metasurface absorber (CMSA), which can achieve the high selective absorption for right-handed and left-handed circular polarization (RCP, “+”, and LCP, “-”) lights at optical frequency. The CMSA is composed of a dielectric substrate sandwiched with bi-layer fourfold twisted semicircle metal nanostructure. The proposed CMSA has a strong selective absorption band, where absorption peaks for LCP and RCP lights occur at different resonance frequencies, reflecting the existence of a significant circular dichroism (CD) effect. It is shown that the absorbance of the CMSA can reach to 93.2% for LCP light and 91.6% for RCP light, and that the maximum CD magnitude is up to 0.85 and 0.91 around 288.5 THz and 404 THz, respectively. The mechanism of the strong chiroptical response of the CMSA is illustrated by electric fields distributions of the unit-cell nanostructure. Furthermore, the influence of the geometry of the proposed CMSA on the circular polarization selective absorption characterization is studied systematically.

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“…CMSs have gained tremendous interest since it can exhibit exotic EM properties including negative refractive index and optical activity [8,9], asymmetric transmission [10,11], giant CD effect [12][13][14], polarization conversion [15,16], and wave front manipulation [17,18]. Since then, various CMSs structures (such as split-ring, gammadion, spiral wire, L-shaped and so on) have been designed to achieve highly-e cient selective chiral eld enhancement for LCP or RCP light as well as CD effect [19][20][21][22][23][24][25][26][27][28][29][30].…”

Section: Introductionmentioning

confidence: 99%

Chiral-selective Plasmonic Metasurface Absorber Based on Bilayer Fourfold Twisted Semicircle Nanostructure at Optical Frequency

Cheng

Chen

Luo

2020

Preprint

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In this paper, we demonstrate theoretically a plasmonic metasurface absorber (PMSA) for the high chiral-selective absorption for right-handed and left-handed circular polarization (RCP and LCP) lights at optical frequency. The PMSA is composed of a dielectric substrate sandwiched with bi-layer fourfold twisted semicircle nanostructure. Numerical simulation results that the proposed PMSA has a strong chiral selective absorption bands, where absorption peaks for LCP and RCP lights occur at different resonance frequencies resulting in significant circular dichroism (CD) effect. It is shown that the maximum absorbance of the PMSA can reach to 93.2% for LCP light and 91.6% for RCP light, and that the maximum CD magnitude is about 0.85 and 0.91 around 288.5 THz and 404 THz, respectively. The mechanism of the strong chiroptical response of the PMSA is illustrated and revealed by electric fields distributions. Furthermore, the influence of the geometry of the proposed PMSA on the chiral-selective absorption characterization is studied systematically. Due to the strong chiral-selective absorption and CD effect, the proposed PMSA can be found many potential applications in some areas, such as chiral imaging, optical filters, detecting, and optical communications.PACS numbers: 42.25.Bs, 78.20.−e

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Multi-band terahertz chiral metasurface with giant optical activities and negative refractive index based on T-shaped resonators

Cited by 13 publications

References 44 publications

Plasmonic Chiral Metasurface Absorber Based on Bilayer Fourfold Twisted Semicircle Nanostructure at Optical Frequency

Plasmonic Chiral Metasurface Absorber Based on Bilayer Fourfold Twisted Semicircle Nanostructure at Optical Frequency

Plasmonic chiral metasurface absorber based on bilayer fourfold twisted semicircle nanostructure at optical frequency

Chiral-selective Plasmonic Metasurface Absorber Based on Bilayer Fourfold Twisted Semicircle Nanostructure at Optical Frequency

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