Active controllable spin-selective terahertz asymmetric transmission based on all-silicon metasurfaces

Li, Jitao; Zheng, Chenglong; Yue, Zhen Xing; Wang, Silei; Li, Mengyao; Zhao, Hongliang; Zhang, Yating; Yao, Jianquan

doi:10.1063/5.0053236

Cited by 67 publications

(17 citation statements)

References 26 publications

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“…A numerical simulation of a single silicon pillar was performed using the finite-difference time-domain method to obtain the electric field intensity distribution results of a single pillar, as shown in Figure 2. This unit can realize that a function similar to that of the F-P resonant cavity [64][65][66][67][68][69][70][71][72] confines the energy of the incident beam in the cylinder, and uses the resonance to enhance it. The honeycomb arrangement can increase the distance between columns in the same area [18] and reduce coupling.…”

Section: Metasurface Unit and Principlementioning

confidence: 99%

Flexible Control of Phase and Polarization based on All‐Dielectric Metamaterials

Zhang

et al. 2023

Adv Quantum Tech

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A metasurface is a planar structure that can flexibly control the polarization, phase, and amplitude of incident electromagnetic waves. An all‐dielectric hexagonal cell structure to reduce the interaction between cells and achieve efficient parametric regulation of electromagnetic waves is proposed. The single resonant transmission phase and the geometric phase are superimposed to realize the composite phase unit structure and construct a multifunctional flat metasurface device. The designed metasurface can flexibly tune the phase and polarization of incident electromagnetic waves and enable multifunctional integration phenomena, such as polarization separation, light intensity convergence, and vector light generation, on a single metasurface.

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Section: Metasurface Unit and Principlementioning

confidence: 99%

Flexible Control of Phase and Polarization based on All‐Dielectric Metamaterials

Zhang

et al. 2023

Adv Quantum Tech

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“…Electromagnetic metasurfaces with polarization manipulations have developed from polarization conversion metasurfaces (PCMs) to meta-polarizers [1-8]. Among them, PCMs can only serve the conversion between specific polarizations [9][10][11][12][13][14][15]. Hence, an additional polarizer is generally required to obtain a certain input polarization.…”

Section: Introductionmentioning

confidence: 99%

Wavefront-controllable all-silicon terahertz meta-polarizer

Yue

et al. 2022

Sci. China Mater.

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Metamaterial devices that can directly generate polarized waves from unpolarized waves and simultaneously manipulate the wavefront are needed for advanced optical applications. However, conventional wavefront-controllable polarization conversion metasurfaces (PCMs) rely on an incident wave with a certain polarization state rather than an unpolarized wave. A few specially designed meta-polarizers had obtained polarized waves from unpolarized waves, but the simultaneous wavefront manipulation was not achieved. In this work, we report wavefront-controllable terahertz (THz) meta-polarizers based on all-silicon materials, which have higher integration characteristics than conventional metapolarizers and wavefront-controllable PCMs. Such THz metapolarizers merge the desired phase profile into meta-atoms' beam interference, and will perform direct generation of polarized waves from unpolarized waves and realize simultaneous wavefront manipulations. This work is expected to provide a new impact for THz wave manipulations.

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“…Metasurfaces have attracted the attention of researchers all over the world due to the growing demand for light, miniaturized, and highly integrated optical devices. Metasurfaces can arbitrarily modulate the amplitude, phase, and polarization state [ 1 , 2 , 3 , 4 ] of the optical field with subwavelength spatial resolution through well-arranged nanoantenna elements. Compared with traditional refractive optical elements, metasurfaces have the advantages of ultralight weight and high compactness [ 5 ].…”

Section: Introductionmentioning

confidence: 99%

Mid-Infrared Broadband Achromatic Metalens with Wide Field of View

et al. 2022

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Metasurfaces have the ability to flexibly control the light wavefront, and they are expected to fill the gaps of traditional optics. However, various aberrations pose challenges for the application of metasurfaces in the wide angle and wide spectral ranges. The previous multi-aberration simultaneous optimization works had shortcomings such as large computational load, complex structure, and low generality. Here, we propose a metalens design method that corrects both monochromatic and chromatic aberrations simultaneously. The monochromatic aberration-corrected phase distribution is obtained by the optical design, and the chromatic aberration is reduced by using the original search algorithm combined with dispersion engineering. The designed single-layered wide-angle achromatic metalens has a balanced and efficient focusing effect in the mid-infrared band from 3.7 μm to 5 μm and a wide angle of ±30°. The design method proposed has the advantages of low computational load, wide application range, and easy experimental fabrication, which provides new inspiration for the development of generalized software for the design and optimization of metasurfaces.

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Active controllable spin-selective terahertz asymmetric transmission based on all-silicon metasurfaces

Cited by 67 publications

References 26 publications

Flexible Control of Phase and Polarization based on All‐Dielectric Metamaterials

Flexible Control of Phase and Polarization based on All‐Dielectric Metamaterials

Wavefront-controllable all-silicon terahertz meta-polarizer

Mid-Infrared Broadband Achromatic Metalens with Wide Field of View

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