Optical Ring Cavity Search for Axion Dark Matter

Ippei Obata, Tomohiro Fujita, Yuta Michimura

Research output: Contribution to journalArticlepeer-review

70 Citations (Scopus)


We propose a novel experiment to search for axion dark matter that differentiates the phase velocities of the left- and right-handed polarized photons. Our optical cavity measures the difference of the resonant frequencies between two circular polarizations of the laser beam. The design of our cavity adopts a double-pass configuration to realize a null experiment and give a high common mode rejection of environmental disturbances. We estimate the potential sensitivity to the axion-photon coupling constant gaγ for the axion mass m10-10 eV. In a low mass range m10-15 eV, we can achieve gaγ3×10-16 GeV-1, which is beyond the current bound by several orders of magnitude.

Original languageEnglish
Article number161301
JournalPhysical Review Letters
Issue number16
Publication statusPublished - 2018 Oct 17
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy(all)


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