Microwave seminar | 26 August 2024

Main paper/arXiv, related to the seminar, and other references:

1. Tunable wire metamaterials for an axion haloscope, Link, Nolan Kowitt, Rustam Balafendiev, Dajie Sun, Mackenzie Wooten, Alexander Droster, Maxim A. Gorlach, Karl van Bibber, and Pavel A. Belov, Phys. Rev. Applied 20, 044051
2. Wire metamaterial filled metallic resonators, Link, Rustam Balafendiev, Constantin Simovski, Alexander J. Millar, and Pavel Belov, Phys. Rev. B 106, 075106
3. Searching for dark matter with plasma haloscopes, Link, Alexander J. Millar et al., Phys. Rev. D 107, 055013
4. Tunable Axion Plasma Haloscopes, Link, Matthew Lawson, Alexander J. Millar, Matteo Pancaldi, Edoardo Vitagliano, and Frank Wilczek, Phys. Rev. Lett. 123, 141802

This presentation introduces a novel anisotropic metamaterial designed to exhibit tailored dispersion characteristics. The metamaterial consists of metal square patches arranged in a glide symmetry pattern, immersed in vacuum. We propose theoretical formulas to describe the electromagnetic tensors of the corresponding uniaxial effective medium, encompassing both dielectric and magnetic responses. Through theoretical analysis and numerical simulations, we demonstrate excellent agreement between the predicted and simulated dispersion properties. These formulas and results expedite the development of further designs for the proposed structure.

Main paper/arXiv, related to the seminar, and other references:

1. Enriquez, J. A., Koreshin, E., Del Risco, J. P., Belov, P. A., & Baena, J. D. (2024). Dispersion Characteristics of a Glide-Symmetric Square Patch Metamaterial with Giant Anisotropy. arXiv preprint arXiv:2407.16722.
2. [2] Chang, T., Kim, J. U., Kang, S. K., Kim, H., Kim, D. K., Lee, Y. H., & Shin, J. (2016). Broadband giant-refractive-index material based on mesoscopic space-filling curves. Nature communications, 7(1), 12661.

Recently, metamaterials have been suggested as a platform for probing axion physics. Here we present an extended version of axion electrodynamics including higher-ordered derivatives of the fields in the constitutive relations using nonreciprocal metamaterial structures. The proposed meta-atom design can realize exotic axion physics and opens avenues for applications in nonreciprocal photonics.

Main paper/arXiv, related to the seminar, and other references:

1. E. Barredo-Alamilla, D. A. Bobylev, and M. A. Gorlach, Axion electrodynamics without Witten effect in metamaterials, Phys. Rev. B 109, 195136 (2024).