Complementary Y-shaped chiral metamaterial with giant optical activity and circular dichroism simultaneously for terahertz waves

Cheng, Yong; Yang, Yong; Zhou, Yu; Zhang, Zhe; Mao, Xue; Gong, Rongzhou

doi:10.1080/09500340.2016.1167976

Cited by 36 publications

(10 citation statements)

References 50 publications

(69 reference statements)

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“…Metamaterials, which are artificial sub‐wavelength periodic structures, have opened up a new avenue toward efficient manipulation of light due to their unique optical properties. Those are valuable in optical rotation, asymmetric transmission (AT), and polarization conversion . Circular‐to‐circular, linear‐to‐linear, linear‐to‐circular (LTC) polarization converters can be realized by different structural designs.…”

Section: Introductionmentioning

confidence: 99%

“…Circular‐to‐circular, linear‐to‐linear, linear‐to‐circular (LTC) polarization converters can be realized by different structural designs. Meanwhile, in order to obtain wider bandwidth, higher transmission efficiency (TE), conversion efficiency (CE) and polarization extinction ratio (PER), converters in transmission mode are usually implemented using chiral metamaterials (CMMs) with strong conversion dichroism (CD) accompanied by AT.…”

Section: Introductionmentioning

confidence: 99%

“…T ± = T xx ± jT yx . An LTC converter is realized by a bi‐layer four‐U‐shaped split ring . Then converters using twisted split‐ring structures are designed to realize multiband conversion.…”

Section: Introductionmentioning

confidence: 99%

“…Those are valuable in optical rotation, 8,9 asymmetric transmission (AT), 10,11 and polarization conversion. [10][11][12][13][14][15][16][17][18][19][20][21][22][23] Circular-tocircular, 12,13 linear-to-linear, [14][15][16] linear-to-circular [17][18][19][20][21][22][23][24][25][26] (LTC) polarization converters can be realized by different structural designs. Meanwhile, in order to obtain wider bandwidth, higher transmission efficiency (TE), conversion efficiency (CE) and polarization extinction ratio (PER), converters in transmission mode are usually implemented using chiral metamaterials (CMMs) with strong conversion dichroism 18,19 (CD) accompanied by AT.…”

Section: Introductionmentioning

confidence: 99%

“…An LTC converter is realized by a bi-layer four-U-shaped split ring. 18 Then converters [21][22][23] using twisted split-ring structures are designed to realize multiband conversion. Ma et al proposed a planar spiral structure to achieve tri-band conversion.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Asymmetric dual‐band linear‐to‐circular converter by bi‐layered chiral metamaterial

Zhang

2019

Int J RF Microw Comput Aided Eng

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In this article, we present a dual‐band linear‐to‐circular transparent converter by bi‐layered chiral metamaterial (CMM) with an inverted “G” array in microwave region. The proposed metasurface consists of three layers which are the upper layer of the metasurface with a periodic regular metallic inverted “G” and wire array, the dielectric layer, and the bottom layer operating as chiral symmetric structure of the upper. The simulation results show that the transmitted right‐circular polarized wave with the axial ratio of 3 dB or less is in the range of 8.6‐10.9 GHz and the left‐circular polarized wave is within 18.1‐22.5 GHz when y‐polarized forward wave is normally incident. Specifically, the polarization conversion transmission can be maintained at over 85% at angle of incidence up to 40°. Therefore, the proposed CMM device is useful for the development of the integrated polarization manipulation devices.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Asymmetric dual‐band linear‐to‐circular converter by bi‐layered chiral metamaterial

Zhang

2019

Int J RF Microw Comput Aided Eng

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An Ultra‐Broadband Chirality Selective Metastructure Absorber using High Impedance Surface

2023

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In this paper, an ultra-wideband chirality selective metastructure absorber is proposed that enables differential absorption and reflection of circularly polarized waves in the terahertz (THz) range. The structure achieves circular dichroism (CD) by using asymmetrically split metal rings as fundamental meta-atoms. Most critically, the high impedance surface and air-resonant cavities are inserted separately in the meta-atoms and dielectric substrate to enhance CD and broaden the bandwidth of absorption. The metastructure absorber can achieve more than 90% absorption of right circularly polarized waves at 0.675-1.244 THz, and it can maintain more than 90% reflection of left circularly polarized waves at 0.607-1.229 THz without changing the direction of rotation. Besides, its CD can reach more than 80% at 0.687-1.213 THz with a relative bandwidth of 55.3%. Spin-selective absorption, which is closely related to breaking chiral symmetry, is investigated through power loss distribution, wide-angle incidence, and scan parameter optimization. The proposed strategy is further validated in the THz band, and the polarization selection and manipulation techniques can be applied to chiral sensing/radio-thermometry, circular polarization detectors/lasers, and molecular spectroscopy.

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Ultrathin dual-band polarization angle independent 90° polarization rotator with giant optical activity based on planar chiral metamaterial

Zhao

Cheng

2018

Appl. Phys. B

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Complementary Y-shaped chiral metamaterial with giant optical activity and circular dichroism simultaneously for terahertz waves

Cited by 36 publications

References 50 publications

Asymmetric dual‐band linear‐to‐circular converter by bi‐layered chiral metamaterial

Asymmetric dual‐band linear‐to‐circular converter by bi‐layered chiral metamaterial

An Ultra‐Broadband Chirality Selective Metastructure Absorber using High Impedance Surface

Ultrathin dual-band polarization angle independent 90° polarization rotator with giant optical activity based on planar chiral metamaterial

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