Active manipulation of plasmon-induced transparency based on a BiFeO3/Si hybrid metasurface in the terahertz range

In this paper, we demonstrate a plasmon-induced transparency (PIT) sample based on a hybrid structure of a metasurface/BiFeO3/Si, which is theoretically and experimentally investigated in the terahertz range. A distinct transparency window can be available in the transmission spectra, which originates from the near-field coupling of two resonators. A modulation depth of 82% can be obtained at the transparency window through tuning the optical pumping power. The photo-excited carriers suppress the resonances of the two bright modes, then the transparency window of the PIT metasurface is nearly disappeared. This work provides a new perspective on exploring the multiferroic material BiFeO3 as well as expanding the practical applications of BFO-based functional devices in the terahertz range. (c) 2020 Elsevier B.V. All rights reserved.

Automated summary

This study investigates a plasmon-induced transparency (PIT) sample based on a hybrid structure of metasurface/BiFeO3/Si in the terahertz range, demonstrating a distinct transparency window with a modulation depth of 82% achievable through tuning the optical pumping power. The research sheds new light on exploring the multiferroic material BiFeO3 and expanding practical applications of BFO-based functional devices in the terahertz range.