Tailoring Electronic and Magnetic Properties of YcoO3 via Anharmonic Phononic Coupling and Vector Vortex Beam Interaction

The ability to dynamically manipulate the optoelectronic and magnetic properties in functional materials under nonequilibrium conditions is essential for the advancement of quantum technologies and energy-related applications. Here, we demonstrate a novel method to regulate the optoelectronic and magnetic properties of YCoO₃, a representative perovskite oxide, using ultrafast vortex laser pulses coupled with nonlinear phonon interactions. Vortex light, characterized by its helical phase front and topological charge, allows selective excitation of infrared phonon modes, enabling anisotropic lattice distortions and precise modulation of material properties. Based on three phonon couplings from B_2u, B_3u, and B_1g, vortex light's angular momentum can alter spin polarization, inducing magnetic moments as high as 1.7 μ_B in YCoO₃. Vortex light is a powerful tool for controlling nonlinear phonon dynamics and light-matter interactions, demonstrating effective manipulation of the optoelectronic and magnetic properties. It provides extraordinary means of developing advanced devices in quantum and optoelectronic applications.