Polar coupling enabled nonlinear optical filtering at MoS₂/ferroelectric heterointerfaces.

ABSTRACT: Complex oxide heterointerfaces and van der Waals heterostructures present two versatile but intrinsically different platforms for exploring emergent quantum phenomena and designing new functionalities. The rich opportunity offered by the synergy between these two classes of materials, however, is yet to be charted. Here, we report an unconventional nonlinear optical filtering effect resulting from the interfacial polar alignment between monolayer MoS₂ and a neighboring ferroelectric oxide thin film. The second harmonic generation response at the heterointerface is either substantially enhanced or almost entirely quenched by an underlying ferroelectric domain wall depending on its chirality, and can be further tailored by the polar domains. Unlike the extensively studied coupling

SUBMITTER: Li D 

PROVIDER: S-EPMC7078226 | biostudies-literature | 2020 Mar

REPOSITORIES: biostudies-literature