Optical Engineering of Band Structure and Spin-Polarization in Unconventional Odd-parity Magnets

We study the effects of optical driving in unconventional odd-parity magnets exemplified by p-wave magnets. Our analysis reveals that low-frequency irradiation can induce even-parity spin polarization within a purely odd-parity magnetic system. In addition to the Floquet sidebands with alternating spin polarization, the optical driving also alters the Fermi surface topology, enabling Lifshitz transitions that are controlled by the amplitude and frequency of the light. These findings demonstrate that light can be utilized as a powerful tool to engineer and manipulate the spin structure and connectivity of electronic bands in unconventional odd-parity magnets.