Light dark matter detection leveraging nonlinear optics and laser interferometry

We propose a novel experimental method for detecting light dark matter leveraging nonlinear electro-optical material in a laser interferometer. A high-precision resonant interferometry scheme can probe dark matter-induced oscillatory modifications to the electromagnetic wave's dispersion relation in the nonlinear medium. We show that this method enables exploring uncharted parameter space of axion and dark photon dark matter of masses 40 micro-eV and above, a challenging parameter space for currently existing methods.