Independent dual-band metamaterial absorber with large frequency ratio based on Helmholtz resonators

IF 3.6 2区物理与天体物理 Q2 PHYSICS, APPLIED

Applied Physics Letters Pub Date : 2025-09-29 DOI:10.1063/5.0284536

Yong Liu, Donghao Zhao, Rui Yang

引用次数: 0

Abstract

We propose a dual-band metamaterial absorber with large frequency ratio, comprising periodic laminated metal–dielectric pyramids cascaded with a Helmholtz resonator array. Specifically, the metal–dielectric pyramids achieve over 90% broadband absorption from 16.6 to 19 GHz while remaining transparent at lower frequencies to the Helmholtz resonator array. Conversely, the Helmholtz resonator array exhibits 99.9% absorption at 2.88 GHz, simultaneously serving as a natural ground for the pyramids. By cascading these two structures, our design achieves independent dual-band absorption with a center-frequency ratio exceeding 6 and no spurious absorption peaks between the bands, paving the way for the development of more advanced multifunctional energy-harvesting devices.

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基于亥姆霍兹谐振腔的大频率比独立双频超材料吸波器

我们提出了一种具有大频率比的双频超材料吸收体，它由周期性叠层金属-介质金字塔级联和亥姆霍兹谐振器阵列组成。具体来说，金属-介电金字塔在16.6至19 GHz范围内实现了90%以上的宽带吸收，同时在较低频率对亥姆霍兹谐振器阵列保持透明。相反，亥姆霍兹谐振器阵列在2.88 GHz处表现出99.9%的吸收率，同时作为金字塔的天然地面。通过这两种结构的级联，我们的设计实现了独立的双频吸收，中心频率比超过6，波段之间没有杂散吸收峰，为开发更先进的多功能能量收集装置铺平了道路。

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

Applied Physics Letters 物理-物理：应用

CiteScore

6.40

自引率

10.00%

发文量

1821

审稿时长

1.6 months

期刊介绍： Applied Physics Letters (APL) features concise, up-to-date reports on significant new findings in applied physics. Emphasizing rapid dissemination of key data and new physical insights, APL offers prompt publication of new experimental and theoretical papers reporting applications of physics phenomena to all branches of science, engineering, and modern technology. In addition to regular articles, the journal also publishes invited Fast Track, Perspectives, and in-depth Editorials which report on cutting-edge areas in applied physics. APL Perspectives are forward-looking invited letters which highlight recent developments or discoveries. Emphasis is placed on very recent developments, potentially disruptive technologies, open questions and possible solutions. They also include a mini-roadmap detailing where the community should direct efforts in order for the phenomena to be viable for application and the challenges associated with meeting that performance threshold. Perspectives are characterized by personal viewpoints and opinions of recognized experts in the field. Fast Track articles are invited original research articles that report results that are particularly novel and important or provide a significant advancement in an emerging field. Because of the urgency and scientific importance of the work, the peer review process is accelerated. If, during the review process, it becomes apparent that the paper does not meet the Fast Track criterion, it is returned to a normal track.