Ferroicity-driven nonlinear photocurrent switching in time-reversal invariant ferroic materials.

ABSTRACT: Nonlinear optical responses to external electromagnetic field, characterized by second- and higher-order susceptibilities, play crucial roles in nonlinear optics and optoelectronics. Here, we demonstrate the possibility to achieve ferroicity-driven nonlinear photocurrent switching in time-reversal invariant multiferroics. It is enabled by the second-order current response to electromagnetic field whose direction can be controlled by both internal ferroic orders and external light polarization. Second-order direct photocurrent consists of shift current and circular photocurrent under linearly and circularly polarized light irradiation, respectively. We elucidate the microscopic mechanism in a representative class of two-dimensional multiferroic materials using group theoretical analyses and

SUBMITTER: Wang H 

PROVIDER: S-EPMC6697433 | biostudies-literature | 2019 Aug

REPOSITORIES: biostudies-literature