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基于金属线编织孔阵列的高透明且偏振保持太赫兹等离子体超材料：传输光谱峰的基本原理与表征

Highly Transparent and Polarization-Maintained Terahertz Plasmonic Metamaterials Based on Metal-Wire-Woven Hole Arrays: Fundamentals and Characterization of Transmission Spectral Peaks.

作者信息

You Borwen, Lu Ja-Yu, Chen Po-Lun, Hung Tun-Yao, Yu Chin-Ping

机构信息

Department of Physics, National Changhua University of Education, No. 1 Jinde Road, Changhua City 50007, Taiwan.

Department of Applied Physics, Faculty of Pure and Applied Sciences, University of Tsukuba, Tennodai 1-1-1, Tsukuba 305-8573, Ibaraki, Japan.

出版信息

Materials (Basel). 2022 Mar 2;15(5):1871. doi: 10.3390/ma15051871.

DOI:10.3390/ma15051871
PMID:35269101
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC8911842/
Abstract

Metal-hole-supported terahertz (THz) waves through the structure of a metal-wire-woven hole array (MWW-HA) present high-frequency-passed transmittance spectra of one plasmonic metamaterial with artificial plasmonic frequencies, which are inversely proportional to metal-hole widths. For the transmitted THz waves of MWW-HA, transverse-electric (TE) and transverse-magnetic (TM) waveguide modes mix within a symmetric metal-hole boundary. THz resonance waves transversely crossing the holes of MWW-HA are experimentally characterized with spectral peaks in the frequency range of 0.1-2 THz that are correlated with aperture sizes, unit-cell-hole widths, metal-wire thicknesses, and wire-bending angles. The metal-hole-transported resonance waves of MWW-HA are dominated by TE waveguide modes instead of TM ones because a hole width of MWW-HA is approximate to the half wavelength of a resonance wave. The round metal edges of the woven metal wires can minimize the effective optical length of a thick metal hole to transmit THz resonance waves, thereby resulting the smallest rotation angle of linear polarization and high transmittance up to 0.94. An MWW-HA structure is therefore reliable for supporting metal-hole resonance waves with low resistance, whereas a metal-slab-perforated hole array cannot achieve the same result.

摘要

通过金属线编织孔阵列（MWW-HA）结构的金属孔支撑太赫兹（THz）波呈现出一种具有人工等离子体频率的等离子体超材料的高频透过光谱，该光谱与金属孔宽度成反比。对于MWW-HA传输的太赫兹波，横向电场（TE）和横向磁场（TM）波导模式在对称金属孔边界内混合。实验表征了横向穿过MWW-HA孔的太赫兹共振波，其在0.1 - 2 THz频率范围内具有与孔径尺寸、单元孔宽度、金属线厚度和线弯曲角度相关的光谱峰值。MWW-HA的金属孔传输共振波由TE波导模式主导，而非TM模式，这是因为MWW-HA的孔宽度近似于共振波的半波长。编织金属线的圆形金属边缘可使厚金属孔的有效光学长度最小化，以传输太赫兹共振波，从而导致线性极化的最小旋转角度和高达0.94的高透过率。因此，MWW-HA结构对于以低电阻支撑金属孔共振波是可靠的，而金属平板穿孔孔阵列则无法达到相同的结果。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2434/8911842/f8120dbf7de9/materials-15-01871-g013.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2434/8911842/7f46a5443386/materials-15-01871-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2434/8911842/037b2509e7c0/materials-15-01871-g009.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2434/8911842/f8120dbf7de9/materials-15-01871-g013.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2434/8911842/5b7ce4ca96ad/materials-15-01871-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2434/8911842/6f5847e72526/materials-15-01871-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2434/8911842/3a47d7e4ea61/materials-15-01871-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2434/8911842/bdb8b248f414/materials-15-01871-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2434/8911842/e3d51ecbd1d7/materials-15-01871-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2434/8911842/7ca97b45c551/materials-15-01871-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2434/8911842/3d6baee90208/materials-15-01871-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2434/8911842/7f46a5443386/materials-15-01871-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2434/8911842/037b2509e7c0/materials-15-01871-g009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2434/8911842/7133b39ad4ce/materials-15-01871-g010.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2434/8911842/10ccdbf2470f/materials-15-01871-g011.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2434/8911842/3c3ce3e56ca0/materials-15-01871-g012.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2434/8911842/f8120dbf7de9/materials-15-01871-g013.jpg

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