Tunable Wire Metamaterials for an Axion Haloscope

Metamaterials based on regular two-dimensional arrays of thin wires have attracted renewed attention in light of a recently proposed strategy to search for dark matter axions. When placed in the external magnetic field, such metamaterials facilitate resonant conversion of axions into plasmons near t...

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Bibliographic Details
Published in:arXiv.org 2023-06
Main Authors: Nolan Kowitt, Sun, Dajie, Wooten, Mackenzie, Droster, Alexander, Karl van Bibber, Balafendiev, Rustam, Gorlach, Maxim A, Belov, Pavel A
Format: Article
Language:English
Subjects:
Arrays
Dark matter
Metamaterials
Plasma
Plasma frequencies
Plasmons
Translations
Wire
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Summary:Metamaterials based on regular two-dimensional arrays of thin wires have attracted renewed attention in light of a recently proposed strategy to search for dark matter axions. When placed in the external magnetic field, such metamaterials facilitate resonant conversion of axions into plasmons near their plasma frequency. Since the axion mass is not known a priori, a practical way to tune the plasma frequency of metamaterial is required. In this work, we have studied a system of two interpenetrating rectangular wire lattices where their relative position is varied. The plasma frequency as a function of their relative position in two dimensions has been mapped out experimentally, and compared with both a semi-analytic theory of wire-array metamaterials and numerical simulations. Theory and simulation yield essentially identical results, which in turn are in excellent agreement with experimental data. Over the range of translations studied, the plasma frequency can be tuned over a range of 16%.
ISSN:2331-8422
DOI:10.48550/arxiv.2306.15734