Efficient Manipulation of Terahertz waves by multi-bit Coding Metasurfaces and its further application

Qi, Yi; Zhang, Baohe; Ding, Jinghui; Zhang, Ting; Wang, Xiangxian; Yi, Zao

doi:10.1088/1674-1056/abd6fc

Cited by 21 publications

(12 citation statements)

References 51 publications

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“…Besides the polarization manipulation, the phase profile can also be controlled by anisotropic metasurface to achieve some novel applications such as holography, [21] meta-lens, [64] RCS reduction, [76] and vortex beam. [77] Here, an anisotropic coding metasurface is designed to achieve both polarization conversion and the phase control of a normally incident plane wave. In order to obtain 90 • phase difference between xand y-polarized waves and their equal transmittance, 4 coding meta-atoms "00/01", "01/10", "10/11", and "11/00" are adopted among the aforementioned 16 elements.…”

Section: Oam Beam Generatormentioning

confidence: 99%

Transmissive 2-bit anisotropic coding metasurface

Lai¹,

Li²,

Wang³

et al. 2022

Chinese Phys. B

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Coding metasurfaces have attracted tremendous interests due to unique capabilities of manipulating electromagnetic wave. However, archiving transmissive coding metasurface is still challenging. Here we propose a transmissive anisotropic coding metasurface that enables the independent control of two orthogonal polarizations. The polarization beam splitter and the OAM generator have been studied as typical applications of anisotropic 2-bit coding metasurface. The simulated far field patterns illustrate that the x and y polarized electromagnetic waves are deflected into two different directions, respectively. The anisotropic coding metasurface has been experimentally verified to realize an orbital angular momentum (OAM) beam with l = 2 of right-handed polarized wave, resulting from both contributions from linear-to-circular polarization conversion and the phase profile modulation. This work is beneficial to enrich the polarization manipulation field and develop transmissive coding metasurfaces.

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Section: Oam Beam Generatormentioning

confidence: 99%

Transmissive 2-bit anisotropic coding metasurface

Lai¹,

Li²,

Wang³

et al. 2022

Chinese Phys. B

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“…The total thickness of the whole nanocavity is 320 nm. COMSOL software was used to verify whether the absorber proposed has a good absorption effect [ 49 ]. In this paper, the absorption characteristics of square cross multilayer metamaterials are simulated by using the finite element method.…”

Section: Design and Structurementioning

confidence: 99%

Broadband Solar Absorber Based on Square Ring cross Arrays of ZnS

Fang

et al. 2021

Micromachines

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Solar energy is an inexhaustible clean energy. However, how to improve the absorption efficiency in the visible band is a long-term problem for researchers. Therefore, an electromagnetic wave absorber with an ultra-long absorption spectrum has been widely considered by researchers of optoelectronic materials. A kind of absorbing material based on ZnS material is presented in this paper. Our purpose is for the absorber to achieve a good and wide spectrum of visible light absorption performance. In the wide spectrum band (553.0 THz–793.0 THz) of the absorption spectrum, the average absorption rate of the absorber is above 94%. Using surface plasmon resonance (SPR) and gap surface plasmon mode, the metamaterial absorber was studied in visible light. In particular, the absorber is insensitive to both electric and magnetic absorption. The absorber can operate in complex electromagnetic environments and at high temperatures. This is because the absorber is made of refractory metals. Finally, we discuss and analyze the influence of the parameters regulating the absorber on the absorber absorption efficiency. We have tried to explain why the absorber can produce wideband absorption.

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“…In the aspect of solar cells, in addition to the Ge solar cells mentioned above, polymer solar cells are also a major research direction. Polymer solar cells have become a hotspot in the research of solar cells due to their advantages such as a simple fabrication process, light weight, cost effectiveness and convenient production of massive area flexible devices [18]. In recent years, great progress has been made in the research of polymer solar cells [19,20].…”

Section: Introductionmentioning

confidence: 99%

Based on Ultrathin PEDOT:PSS/c-Ge Solar Cells Design and Their Photoelectric Performance

Yang

et al. 2021

Coatings

Self Cite

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In recent years, nanostructures have improved the performance of solar cells and are regarded as the most promising microstructures. The optical properties of PEDOT:PSS/c-Ge hybrid solar cells (HSCs) based on the octagon germanium nanoparticles (O-GNPs) were numerically analyzed using the finite-difference time-domain (FDTD) method. The optimal structure of the hybrid solar cell is determined by changing the thickness of the organic layer and structural parameters of nanoparticles to enhance the optical absorption and eventually achieve high broadband absorption. By changing the structure parameter of O-GNPs, we studied its effect on solar cells. The optimization of geometric parameters is based on maximum absorption. The light absorption of our optimized HSCs is basically above 90% between 200 and 1500 nm. PEDOT:PSS is placed on top of O-GNPs to transmit the holes better, allowing O-GNPs to capture a lot of photons, to increase absorbance value properties in the AM1.5 solar spectral irradiated region. The transmittance is increased by adding poly-methyl methacrylate (PMMA). At the same time, the electrical characteristics of Ge solar cells were simulated by DEVICE, and short-circuit current (Jsc), open-circuit voltage (Voc), maximum power (Pmax), filling coefficient (FF) and photoelectric conversion efficiency (PCE) were obtained. According to the optimization results after adjusting the structural parameters, the maximum short-circuit current is 44.32 mA/cm2; PCE is 7.84 mW/cm2; FF is 69%. The results show that the O-GNPs have a good light trapping effect, and the structure design has great potential for the absorption of HSCs; it is believed that the conversion efficiency will be further improved through further research.

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Efficient Manipulation of Terahertz waves by multi-bit Coding Metasurfaces and its further application

Cited by 21 publications

References 51 publications

Transmissive 2-bit anisotropic coding metasurface

Transmissive 2-bit anisotropic coding metasurface

Broadband Solar Absorber Based on Square Ring cross Arrays of ZnS

Based on Ultrathin PEDOT:PSS/c-Ge Solar Cells Design and Their Photoelectric Performance

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