Speaker
Description
Axions and axion-like particles (ALPs) are one of the leading candidates for dark matter. While many experiments have utilized the axion-photon conversion in magnetic fields, they have not been detected yet. Recently, novel axion dark matter search experiments using optical cavities have been proposed. These experiments are sensitive to the rotation of linearly polarized light induced by the axion-photon interaction. We have proposed Dark matter Axion search with riNg Cavity Experiment (DANCE), which aims to search for ALPs by detecting the polarization rotation. The first observation has been completed, and the results indicated that carrier s-polarization and p-polarization generated by ALPs were not resonant in the cavity simultaneously due to oblique incidence on the mirrors, degrading the sensitivity in the low axion mass regions. To address this issue, we achieved simultaneous resonance of s- and p-polarizations by using zero phase shift mirrors and a wavelength tunable laser. We report on the detailed methods for further improving the sensitivity and present the latest results.