Giant electric field-induced second harmonic generation in polar skyrmions.

ABSTRACT: Electric field-induced second harmonic generation allows electrically controlling nonlinear light-matter interactions crucial for emerging integrated photonics applications. Despite its wide presence in materials, the figures-of-merit of electric field-induced second harmonic generation are yet to be elevated to enable novel device functionalities. Here, we show that the polar skyrmions, a topological phase spontaneously formed in PbTiO₃/SrTiO₃ ferroelectric superlattices, exhibit a high comprehensive electric field-induced second harmonic generation performance. The second-order nonlinear susceptibility and modulation depth, measured under non-resonant 800 nm excitation, reach ~54.2 pm V^-1 and ~664% V^-1, respectively, and high response bandwidth

SUBMITTER: Wang S 

PROVIDER: S-EPMC10866987 | biostudies-literature | 2024 Feb

REPOSITORIES: biostudies-literature