All-Optical Generation of Antiferromagnetic Magnon Currents via the\n Magnon Circular Photogalvanic Effect

Abstract

We introduce the magnon circular photogalvanic effect enabled by stimulated\nRaman scattering. This provides an all-optical pathway to the generation of\ndirected magnon currents with circularly polarized light in honeycomb\nantiferromagnetic insulators. The effect is the leading order contribution to\nmagnon photocurrent generation via optical fields. Control of the magnon\ncurrent by the polarization and angle of incidence of the laser is\ndemonstrated. Experimental detection by sizeable inverse spin Hall voltages in\nplatinum contacts is proposed.\n