The compatible design of wave controlling metamaterial with multi-layers

IF 2.1 4区物理与天体物理 Q3 PHYSICS, CONDENSED MATTER

Solid State Communications Pub Date : 2024-09-05 DOI:10.1016/j.ssc.2024.115684

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Abstract

A new multi-layers phononic crystal (PnCs) with outer and inner supporting beams is designed to show how the different layers affect the band gap (BG) formations and the corresponding frequency ranges. The BG structures of the designed PnCs revealed that the natural frequencies of the different layers should be compatible for the BG formations although weak interface/support is generally recognized to lead to wide band gaps (BGs). The excessive long supporting beam can reduce the natural frequencies of the current layer leading to incompatibility for the formation of BGs. This can cause the decrease of BG and even disappearance of BG in PnCs. The formed BG frequencies are highly relevant to both the material property (E/ρ) and the geometrical properties (I/S and l). The change of the vibration mode from one layer to another is the key for the opening of the new BGs in the designed PnCs. The increase of E/ρ can lead to the increase of the BG frequencies. This is the reason that the use of non-metals in PnCs can lead to the obvious decrease of BG frequencies in comparison with PnCs with metals.

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多层控波超材料的兼容设计

我们设计了一种带有内外支撑梁的新型多层声子晶体（PnCs），以展示不同层如何影响带隙（BG）的形成以及相应的频率范围。设计的 PnCs 的带隙结构表明，尽管弱界面/支撑一般被认为会导致宽带隙，但不同层的固有频率应与带隙的形成相匹配。过长的支撑梁会降低当前层的固有频率，导致不相容带隙的形成。这会导致 PnC 中的带隙减小甚至消失。形成的 BG 频率与材料特性（E/ρ）和几何特性（I/S 和 l）都有很大关系。振动模式从一层到另一层的变化是在所设计的 PnC 中打开新 BG 的关键。E/ρ 的增加会导致 BG 频率的增加。这就是在 PnC 中使用非金属会导致 BG 频率比使用金属的 PnC 明显降低的原因。

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

Solid State Communications 物理-物理：凝聚态物理

CiteScore

3.40

自引率

4.80%

发文量

287

审稿时长

51 days

期刊介绍： Solid State Communications is an international medium for the publication of short communications and original research articles on significant developments in condensed matter science, giving scientists immediate access to important, recently completed work. The journal publishes original experimental and theoretical research on the physical and chemical properties of solids and other condensed systems and also on their preparation. The submission of manuscripts reporting research on the basic physics of materials science and devices, as well as of state-of-the-art microstructures and nanostructures, is encouraged. A coherent quantitative treatment emphasizing new physics is expected rather than a simple accumulation of experimental data. Consistent with these aims, the short communications should be kept concise and short, usually not longer than six printed pages. The number of figures and tables should also be kept to a minimum. Solid State Communications now also welcomes original research articles without length restrictions. The Fast-Track section of Solid State Communications is the venue for very rapid publication of short communications on significant developments in condensed matter science. The goal is to offer the broad condensed matter community quick and immediate access to publish recently completed papers in research areas that are rapidly evolving and in which there are developments with great potential impact.