金属线填充超材料谐振器
Wire metamaterial filled metallic resonators
摘要：
在这项工作中，我们研究的谐振器的电磁特性最近建议的搜索轴子-一个假设的候选人来解释暗物质。金属丝介质加载谐振器（当用来寻找暗物质时称为等离子体晕轮）由一个盒子组成，盒子里装满了密集的平行金属丝阵列，金属丝与顶壁和底壁电连接。我们表明，线介质的均匀化模型适用于这种谐振器，没有介观校正，并且谐振器质量$Q$在我们感兴趣的频率下降与谐振器体积$V$的增长，直到它是由电阻损失占主导地位的线。我们发现，即使在室温下，像铜这样的金属也可以给出数千个品质因数，比最初假设的高一个数量级。我们的理论结果为加载和卸载谐振腔品质因数证实了建立一个实验样机。我们讨论了进一步改善WM加载谐振器的方法。
英文摘要：
In this work we study electromagnetic properties of a resonator recently suggested for the search of axions - a hypothetical candidate to explain dark matter. A wire medium loaded resonator (called a plasma haloscope when used to search for dark matter) consists of a box filled with a dense array of parallel wires electrically connected to top and bottom walls. We show that the homogenization model of wire medium works for this resonator without mesoscopic corrections, and that the resonator quality $Q$ at the frequency of our interest drops versus the growth of the resonator volume $V$ until it is dominated by resistive losses in the wires. We find that even at room temperature metals like copper can give quality factors in the thousands, an order of magnitude higher than originally assumed. Our theoretical results for both loaded and unloaded resonator quality factors were confirmed by building an experimental prototype. We discuss ways to further improve WM loaded resonators.
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