Labyrinthine Spoof SPP Multi-band Bandpass Filters

IF 3.3 4区 物理与天体物理 Q2 CHEMISTRY, PHYSICAL
Miao Zhang, Zhixia Xu, Shiqiang Fu, Weiye Zhong, Hai Lan
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引用次数: 0

Abstract

The surface plasmon polariton (SPP) is an electromagnetic wave mode that occurs at the interface of a metal and a dielectric material. It possesses unique properties such as enhancing the strength of the electromagnetic field at the metal surface, achieving sub-wavelength focusing of light waves, and exhibiting low loss. Due to these characteristics, SPP holds great promise in various applications including super-resolution imaging, terahertz technology, biosensing, and optical communication. This paper proposes two Spoof SPP-based tri-band bandpass filters that replace the conventional sawtooth cell structure with a miniaturized labyrinth resonator structure. Upon investigating the dispersion characteristics of the resonators, we found that both resonator unit 1 and resonator unit 2 exhibit three modes, resulting in three notch points for each filter. Unlike most SPP-based structures, our design features a compact structure fed by a co-planar waveguide (CPW) without an added ground at the bottom, thereby reducing losses and improving efficiency. To achieve a smoother transition from CPW to the transmission structure, we utilize a segment of microstrip line structure synthesized by a logarithmic function. Both filters are of the same size, with dimensions totaling 192 mm × 42 mm. Based on our study, we have designed two filters with multiple notch points and have obtained good agreement between the simulation results and the actual test results.

Abstract Image

迷宫式欺骗 SPP 多波段带通滤波器
表面等离子体极化子(SPP)是发生在金属和电介质材料界面上的一种电磁波模式。它具有增强金属表面电磁场强度、实现光波亚波长聚焦和低损耗等独特特性。由于这些特性,SPP 在超分辨成像、太赫兹技术、生物传感和光通信等各种应用中大有可为。本文提出了两种基于 SPP 的三波段带通滤波器,用微型迷宫式谐振器结构取代了传统的锯齿单元结构。在研究谐振器的色散特性时,我们发现谐振器单元 1 和谐振器单元 2 都表现出三种模式,因此每个滤波器都有三个陷波点。与大多数基于 SPP 的结构不同,我们的设计采用了由共平面波导(CPW)馈电的紧凑型结构,底部没有增加接地,从而减少了损耗并提高了效率。为了实现从 CPW 到传输结构的平滑过渡,我们采用了一段由对数函数合成的微带线结构。两个滤波器的尺寸相同,总计 192 mm × 42 mm。根据我们的研究,我们设计了两个具有多个陷波点的滤波器,仿真结果与实际测试结果之间取得了良好的一致性。
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来源期刊
Plasmonics
Plasmonics 工程技术-材料科学:综合
CiteScore
5.90
自引率
6.70%
发文量
164
审稿时长
2.1 months
期刊介绍: Plasmonics is an international forum for the publication of peer-reviewed leading-edge original articles that both advance and report our knowledge base and practice of the interactions of free-metal electrons, Plasmons. Topics covered include notable advances in the theory, Physics, and applications of surface plasmons in metals, to the rapidly emerging areas of nanotechnology, biophotonics, sensing, biochemistry and medicine. Topics, including the theory, synthesis and optical properties of noble metal nanostructures, patterned surfaces or materials, continuous or grated surfaces, devices, or wires for their multifarious applications are particularly welcome. Typical applications might include but are not limited to, surface enhanced spectroscopic properties, such as Raman scattering or fluorescence, as well developments in techniques such as surface plasmon resonance and near-field scanning optical microscopy.
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