Searches for dark matter axion involve the use of microwave resonant cavities operating in a strong magnetic field. Detector sensitivity is directly related to the cavity quality factor, which is limited, however, by the presence of the external magnetic field. In this paper we present a cavity of novel design whose quality factor is not affected by a magnetic field. It is based on a photonic structure by the use of sapphire rods. The quality factor at cryogenic temperature is in excess of 5×105 for a selected mode.
@article{arxiv.2002.01816,
title = {High quality factor photonic cavity for dark matter axion searches},
author = {D. Alesini and C. Braggio and G. Carugno and N. Crescini and D. D'Agostino and D. Di Gioacchino and R. Di Vora and P. Falferi and U. Gambardella and C. Gatti and G. Iannone and C. Ligi and A. Lombardi and G. Maccarrone and A. Ortolan and R. Pengo and C. Pira and A. Rettaroli and G. Ruoso and L. Taffarello and S. Tocci},
journal= {arXiv preprint arXiv:2002.01816},
year = {2020}
}