Practical photonic band gap structures for high frequency axion haloscopes

2024/11/28 by D. Goulart, Goulart, D., A. M. Sindhwad +21 · 1 voice · 1 citation
Physics and Astronomy · #Cosmology and Gravitation Theories #Dark Matter and Cosmic Phenomena #Galaxies: Formation, Evolution, Phenomena #astro-ph.CO #hep-ex

paper · pdf · doi:10.48550/arxiv.2411.18914

openalex publication_date 2024/11/28 · openalex created_date 2024/12/05 · openalex updated_date 2026/07/28

Abstract

Current and future searches for dark matter axions, based on their resonant conversion to photons in a magnetic field, span many orders of magnitude. A major impediment to designing resonators at the high end of this range, 5 GHz and above, is the proliferation of TE modes, which overwhelm and hybridize with the TM010 mode to which the axion couples, making the search impossible. We demonstrate that a photonic band gap structure can be designed that completely suppresses the TE spectrum, even reducing the number of lattice periods to two or one, and violating perfect lattice symmetry. This allows tunable resonators to be designed in a convenient, volumetrically efficient circular geometry thus enabling future searches in the post-inflation axion mass range.

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Discussions

• This one is a design for an axion dark matter detection experiment. Notably, this is focused on the scenario where axions were produced *after* inflation, meaning that the misalignment angle may vary [bsky, 9 points, 2 comments]

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