Active control scattering manipulation for realization of switchable EIT-like response metamaterial

Abstract

Electromagnetically induced transparency (EIT) is a promising technology that can improve the interaction between light and matter. The use of EIT-like in artificial functional microstructures considerably reduces the extreme requirements for the experimental observation of EIT-like spectra. In this paper, we proposed an active control electromagnetic modulator of the EIT-like spectrum induced by the metallic cut-wire metamaterial. Meanwhile, to realize switchable EIT-like behaviors, we used actively controlled scattering spectral modulation to create ”on/off” states and the specific operation is to rotate the “Y” shape symmetry metallic cut-wire metamaterial counterclockwise with a 30° step. We performed numerical calculations and detailed analyzes of the microscopic response of the metamaterial and showed the mode coupling between the electrical dipole resonances. Meanwhile, we have confirmed that the switching properties of the EIT-like spectrum can be significantly modulated under rather a small rotation angle at the transmission characteristic peak of the metamaterial and that the EIT-like resonance frequency modulation based on actively controlled scattering operation shows the advantages of extended metamaterial resonance modulation and operating frequency bands.