Wideband and polarisation‐independent antireflection coating using metamaterials

Sepehripour, Fahimeh; Karimi, Parisa; Khavasi, Amin

doi:10.1049/iet-opt.2019.0116

Cited by 6 publications

(2 citation statements)

References 28 publications

(49 reference statements)

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“…He et al provided high reversible capacities of 517.4 and 362.4 mAh g −1 at 100 and 1000 mA g −1 , respectively, when optimised vacancy-rich MoSSe alloys were used as anodes for potassium ion batteries. [88] In accordance with the above applications, TMD alloys are yet to be developed for applications in imaging [89], metamaterials [90], etc., which are areas also in need of development. C showed a TCR as high as -1.633%/K, which demonstrated their potential for further development and application in thermal sensors [85].…”

Section: Lasersmentioning

confidence: 99%

Progress on Two-Dimensional Transitional Metal Dichalcogenides Alloy Materials: Growth, Characterisation, and Optoelectronic Applications

Yu,

Wu,

Zhao

et al. 2023

Nanomaterials

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Two-dimensional (2D) transitional metal dichalcogenides (TMDs) have garnered remarkable attention in electronics, optoelectronics, and hydrogen precipitation catalysis due to their exceptional physicochemical properties. Their utilisation in optoelectronic devices is especially notable for overcoming graphene’s zero-band gap limitation. Moreover, TMDs offer advantages such as direct band gap transitions, high carrier mobility, and efficient switching ratios. Achieving precise adjustments to the electronic properties and band gap of 2D semiconductor materials is crucial for enhancing their capabilities. Researchers have explored the creation of 2D alloy phases through heteroatom doping, a strategy employed to fine-tune the band structure of these materials. Current research on 2D alloy materials encompasses diverse aspects like synthesis methods, catalytic reactions, energy band modulation, high-voltage phase transitions, and potential applications in electronics and optoelectronics. This paper comprehensively analyses 2D TMD alloy materials, covering their growth, preparation, optoelectronic properties, and various applications including hydrogen evolution reaction catalysis, field-effect transistors, lithium-sulphur battery catalysts, and lasers. The growth process and characterisation techniques are introduced, followed by a summary of the optoelectronic properties of these materials.

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Section: Lasersmentioning

confidence: 99%

Progress on Two-Dimensional Transitional Metal Dichalcogenides Alloy Materials: Growth, Characterisation, and Optoelectronic Applications

Yu,

Wu,

Zhao

et al. 2023

Nanomaterials

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“…With the discovery of lower-dimensional topological corner states and hinge states, higher-order TIs have been proposed, which breaks the traditional bulk-boundary correspondence. Higherorder TIs correlate with the overall properties of materials and topological bulk polarization, bringing a new method to realize topological phases in higher dimensions [10,[18][19][20][21][22][23][24][25].…”

Section: Introductionmentioning

confidence: 99%

Evolution of the edge states and corner states in a multilayer honeycomb valley-Hall topological metamaterial

Tao

Liu

et al. 2023

Phys. Rev. B

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The valley-Hall effect provides topological protection to a broad class of defects in valley-Hall photonic topological metamaterials. Unveiling precisely how such protection is achieved and its implications in practical implementations is paramount to move from fundamental science to applications. To this end, we investigate a honeycomb valley-Hall topological metamaterial and monitor the evolution of the topological valley-Hall edge states and higher-order corner states under different perturbation δR. The evolutions of the edge states of the armchair and zigzag interfaces are demonstrated, respectively. By adjusting the geometric parameters and introducing disturbances to break the inversion symmetry, we achieve the edge states with different modes including the conventional crossed edge state and the specific gapped edge state. It is found that the edge states of topological valley kinking will gradually separate with the increase of δR, and finally a complete gap between the edge states appears. The gap has rarely been reported previously in topological materials fabricated by printed circuit board technology. In addition, the higher-order topological corner states can also be observed in the proposed topological metamaterial. The higher-order topological phase is theoretically characterized by nontrivial bulk polarization and the Wannier centers. Our results show that the corner state localization becomes stronger with the increase of δR. It is expected that our results will provide a platform for the realization of optical topological insulators.

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Ultra-efficiency broadband terahertz polarization converter based on a cross-shaped metamaterial

et al. 2022

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In this study, we describe the design, fabrication, and characterization of a cross-shaped structure reflective broadband THz polarization converter. The operating bandwidth of the proposed polarization converter was in the range of 0.8–1.6 THz. The polarization conversion rate (PCR) exceeded 85% in the frequency range of 1.07–1.35 THz and was as high as 91% at 1.35 THz. The cross PCR value exceeded 85% in the frequency range of 1.05–1.35 THz and reached a maximum value of 91%. The performance characteristics (bandwidth and PCR) of the proposed polarization converter were compared with those of similar previously reported devices, and the results indicated that the proposed polarization converter exhibits better performance. The proposed THz polarization converter is suitable for a wide range of applications in communication and polarization manipulation devices.

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Wideband and polarisation‐independent antireflection coating using metamaterials

Cited by 6 publications

References 28 publications

Progress on Two-Dimensional Transitional Metal Dichalcogenides Alloy Materials: Growth, Characterisation, and Optoelectronic Applications

Progress on Two-Dimensional Transitional Metal Dichalcogenides Alloy Materials: Growth, Characterisation, and Optoelectronic Applications

Evolution of the edge states and corner states in a multilayer honeycomb valley-Hall topological metamaterial

Ultra-efficiency broadband terahertz polarization converter based on a cross-shaped metamaterial

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