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 YCoO, 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, B, and B, vortex light's angular momentum can alter spin polarization, inducing magnetic moments as high as 1.7 μ in YCoO. 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.
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| http://dx.doi.org/10.1021/acs.jpclett.5c00298 | DOI Listing |
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