Wire metamaterial filled metallic resonators

Balafendiev, Rustam; Simovski, Constantin; Millar, Alexander J.; Belov, Pavel A.

doi:10.1103/physrevb.106.075106

Cited by 13 publications

(7 citation statements)

References 52 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…When n − m a d = π, the in-medium wavelength of the magnon-polariton mode matches the slab's thickness, so that cot(n − m a d/2) vanishes, leading to a greatly enhanced form factor. This phenomenon is familiar from other axion searches using quasiparticle resonances [132][133][134][135][136] and remains approximately true even at finite Q.…”

Section: Jhep05(2024)314mentioning

confidence: 71%

“…[91]; in particular, it shows that for large ε, which occurs in conductors with σ ≫ m a , the axion-induced current is significantly screened. On the other hand, it was not previously realized that the current can be resonantly enhanced when ε approaches zero, which occurs when the axion mass matches that of a quasiparticle that mixes with the photon, such as a plasmon or phonon [61,123,[131][132][133][134][135][136]. However, the frequencies of such resonances are often not easily tunable.…”

Section: Axioelectric Polarization Currentsmentioning

confidence: 99%

See 1 more Smart Citation

Physical signatures of fermion-coupled axion dark matter

Berlin,

Millar,

Trickle

et al. 2024

J. High Energ. Phys.

Self Cite

View full text Add to dashboard Cite

In the presence of axion dark matter, fermion spins experience an “axion wind” torque and an “axioelectric” force. We investigate new experimental probes of these effects and find that magnetized analogs of multilayer dielectric haloscopes can explore orders of magnitude of new parameter space for the axion-electron coupling. We also revisit the calculation of axion absorption into in-medium excitations, showing that axioelectric absorption is screened in spin-polarized targets, and axion wind absorption can be characterized in terms of a magnetic energy loss function. Finally, our detailed theoretical treatment allows us to critically examine recent claims in the literature. We find that axioelectric corrections to electronic energy levels are smaller than previously estimated and that the purported electron electric dipole moment due to a constant axion field is entirely spurious.

show abstract

Section: Jhep05(2024)314mentioning

confidence: 71%

Section: Axioelectric Polarization Currentsmentioning

confidence: 99%

Physical signatures of fermion-coupled axion dark matter

Berlin,

Millar,

Trickle

et al. 2024

J. High Energ. Phys.

Self Cite

View full text Add to dashboard Cite

show abstract

“…At room temperature and with the current wire parameters, this would imply a quality factor in the bulk limit

Q = \nu _{\text{p}} / \Gamma \approx 220

, to be compared with a theoretical value of 260. [ 44 ] However, a resonator of a given frequency can be designed with any choice of correlated wire radius and spacing. These authors find that in the 10 GHz frequency range, the optimum Q is achieved for a wire radius of ≈3 mm, and spacing ≈10 mm, where the improvement in Q would be a factor of × 17, bringing the theoretical maximum value to 4400.…”

Section: Resultsmentioning

confidence: 99%

“…As shown in ref. [44], the

TM_{010}

eigenmode of interest lies slightly higher in frequency than the plasma frequency itself; for simple cavity geometries, the relationship between the eigenfrequency and the plasma frequency can be expressed analytically, but for more complex geometries, by simulation.…”

Section: Resultsmentioning

confidence: 99%

Exploration of Wire Array Metamaterials for the Plasma Axion Haloscope

et al. 2023

View full text Add to dashboard Cite

A plasma haloscope has recently been proposed as a feasible approach to extend the search for dark matter axions above 10 GHz (≈40 eV), whereby the microwave cavity in a conventional axion haloscope is supplanted by a wire array metamaterial. Since the plasma frequency of a metamaterial is determined by its unit cell, and is thus a bulk property, a metamaterial resonator of any frequency can be made arbitrarily large, in contrast to a microwave cavity which incurs a steep penalty in volume with increasing frequency. To assess the actual potential of this concept as a practical dark matter haloscope, the basic properties of wire array metamaterials have been investigated through an extensive series of S21 measurements in the 10 GHz range. This report presents some new systematics of wire array metamaterials themselves including the approach to full plasmonic behavior, the applicability of the semianalytic theory of Belov, and estimates of the loss term which bode favorably for the plasmonic haloscope application. This present work constitutes the first precision test of the semianalytic theory of Belov et al., for which the predicted plasma frequency agrees with the experimental value at the 0.1% level.

show abstract

“…A related concept is the wire metamaterial plasma haloscope [14], which achieves optimal resonant signal enhancement independent of volume. It is believed that dielectric and plasma haloscopes can be mechanically tuned for frequencies up to 100 GHz, though prototypes are still in development [15][16][17].…”

Section: Introductionmentioning

confidence: 99%

Axion detection with phonon-polaritons revisited

Marsh,

McDonald,

Millar

et al. 2022

Preprint

Self Cite

View full text Add to dashboard Cite

In the presence of a background magnetic field, axion dark matter induces an electric field and can thus excite phonon-polaritons in suitable materials. We revisit the calculation of the axion-photon conversion power output from such materials, accounting for finite volume effects, and material losses. Our calculation shows how phonon-polaritons can be converted to propagating photons at the material boundary, offering a route to detecting the signal. Using the dielectric functions of GaAs, Al2O3, and SiO2, a fit to our loss model leads to a signal of lower magnitude than previous calculations. We demonstrate how knowledge of resonances in the dielectric function can directly be used to calculate the sensitivity of any material to axion dark matter. We argue that a combination of low losses encountered at O(1) K temperatures and near future improvements in detector dark count allow one to probe the QCD axion in the mass range ma ≈ 100 meV. This provides further impetus to examine novel materials and further develop detectors in the THz regime. We also discuss possible tuning methods to scan the axion mass.

show abstract

Wire metamaterial filled metallic resonators

Cited by 13 publications

References 52 publications

Physical signatures of fermion-coupled axion dark matter

Physical signatures of fermion-coupled axion dark matter

Exploration of Wire Array Metamaterials for the Plasma Axion Haloscope

Axion detection with phonon-polaritons revisited

Contact Info

Product

Resources

About