Light Shining Through a Thin Wall: Evanescent Hidden Photon Detection

• DOI: 10.48550/arxiv.2303.00014
• Publication Date: 2023-01-01
• Authors: Asher Berlin; Roni Harnik; Ryan Janish
• Keywords: Ranging

A kinetically-mixed hidden photon is sourced as an evanescent mode by electromagnetic fields that oscillate at a frequency smaller than the mass. These modes fall off exponentially with distance, but nevertheless yield detectable signals in regeneration experiment if barrier made sufficiently thin. We consider such using superconducting cavities GHz frequencies, proposing various cavity and arrangements enable unique sensitivity to masses ranging from $10^{-5}$ eV $ 10^{-1}$ eV.