Tunable Wire Metamaterials for an Axion Haloscope

Abstract

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%.

References in corpus (9)

• Dark Matter Candidates from Particle Physics and Methods of Detection
• New experimental approaches in the search for axion-like particles
• Strong spatial dispersion in wire media in the very large wavelength limit
• A quantum-enhanced search for dark matter axions
• Tunable axion plasma haloscopes
• Structural tunability in metamaterials
• Search for invisible axion dark matter with a multiple-cell haloscope
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• Tunability of wire-grid metamaterial immersed into nematic liquid crystal

Cited by in corpus (3)

• Anisotropy in a wire medium resulting from the rectangularity of a unit cell
• Volume-Preserving Deformation of Honeycomb Wire Media Enables Broad Plasma Frequency Tunability
• Quantum Semiconductor Heterostructures for meV Axion Dark Matter Detection