A triple-functional integration terahertz device based on trapezoidal and stub resonators in bulk Dirac semimetals waveguide structure

IF 3 Q2 PHYSICS, CONDENSED MATTER

Micro and Nanostructures Pub Date : 2025-07-08 DOI:10.1016/j.micrna.2025.208265

Xueyun Tang, Fang Chen

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引用次数: 0

Abstract

This study introduces a BDS-insulator-BDS waveguide platform that simultaneously enables Fano resonance, band-stop filtering, and band-pass filtering at terahertz frequencies—a triple-functional integration achieved for the first time. Finite-difference time-domain (FDTD) simulations reveal that tuning geometric parameters, Fermi level, and relaxation time of the structure permits concurrent modulation of the band-stop filter bandwidth and spectral profile of the FR peaks. Notably, the plasmonic system exhibits exceptional environmental refractive index sensitivity, achieving a maximum sensitivity of 2.628 THz/RIU, with peak figure-of-merit (FOM) and quality factor (Q) values of 87.6

R I U^{- 1}

and 154.88, respectively. This multi-parametric, multifunctional plasmonic module holds promise for advanced applications in terahertz slow-light systems, high-sensitivity sensing, tunable filtering, and miniaturized, highly integrated photonic devices.

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基于梯形和短段谐振腔的三功能集成太赫兹器件

本研究介绍了一种bds绝缘体- bds波导平台，该平台可同时实现太赫兹频率下的法诺共振、带阻滤波和带通滤波，首次实现了三功能集成。时域有限差分（FDTD）仿真表明，调整结构的几何参数、费米能级和弛豫时间可以同时调制带阻滤波器的带宽和FR峰的频谱分布。值得注意的是，等离子体系统表现出优异的环境折射率灵敏度，最大灵敏度为2.628 THz/RIU，峰值品质因数（FOM）和质量因子(Q)分别为87.6 RIU−1和154.88。这种多参数、多功能等离子体模块有望在太赫兹慢光系统、高灵敏度传感、可调谐滤波和小型化、高度集成的光子器件中得到先进应用。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Micro and Nanostructures

CiteScore

6.50

自引率

0.00%

发文量