Dual-Band Polarization-Independent Terahertz Absorber Based on F-Shaped Multimode Structure

IF 2.3 3区工程技术 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC

IEEE Photonics Technology Letters Pub Date : 2024-09-03 DOI:10.1109/LPT.2024.3454175

Daotong Li;Dongyi Sui;Kai-Da Xu;Dongxu Wang;Ying Liu;Siyuan Luo;Naoki Shinohara

引用次数: 0

Abstract

In this letter, a dual-band polarization-independent terahertz (THz) metamaterial absorber (MA) based on metal-insulator-metal (MIM) configuration is proposed and measured. The flexible material polyimide is chosen as the substrate. The periodic metal array cell on the top surface is fabricated utilizing four F-shaped metal strips, and due to the high symmetry of the structure, the designed absorber is insensitive to polarization. Furthermore, the impact of structural parameters on the absorption characteristics is numerically investigated, and the results indicate that the absorption peak can be flexibly adjusted by changing the length of the top metal strip. The proposed MA achieves near-perfect absorption at 0.555 THz and 0.797 THz under normal TE and TM polarized incidence, with Q-factors of 23.56 and 45.28, respectively. This work provides a new design strategy for the realization of multi-band THz MA.

查看原文本刊更多论文

基于 F 型多模结构的双波段极化无关太赫兹吸收器

在这封信中，我们提出并测量了一种基于金属-绝缘体-金属（MIM）配置的、与偏振无关的双波段太赫兹（THz）超材料吸收器（MA）。基底选用柔性材料聚酰亚胺。由于结构的高度对称性，所设计的吸收器对极化不敏感。此外，还对结构参数对吸收特性的影响进行了数值研究，结果表明可以通过改变顶部金属带的长度来灵活调整吸收峰值。在正常 TE 和 TM 极化入射条件下，所提出的 MA 在 0.555 THz 和 0.797 THz 实现了近乎完美的吸收，Q 系数分别为 23.56 和 45.28。这项工作为实现多波段 THz MA 提供了一种新的设计策略。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

IEEE Photonics Technology Letters 工程技术-工程：电子与电气

CiteScore

5.00

自引率

3.80%

发文量

404

审稿时长

2.0 months

期刊介绍： IEEE Photonics Technology Letters addresses all aspects of the IEEE Photonics Society Constitutional Field of Interest with emphasis on photonic/lightwave components and applications, laser physics and systems and laser/electro-optics technology. Examples of subject areas for the above areas of concentration are integrated optic and optoelectronic devices, high-power laser arrays (e.g. diode, CO2), free electron lasers, solid, state lasers, laser materials'' interactions and femtosecond laser techniques. The letters journal publishes engineering, applied physics and physics oriented papers. Emphasis is on rapid publication of timely manuscripts. A goal is to provide a focal point of quality engineering-oriented papers in the electro-optics field not found in other rapid-publication journals.