posted on 2023-10-06, 08:42authored byBaoku Wang, Fei Yan, Fengjun Tian, Weimin Sun, Li Li
Nonlinear metamaterials hold a promising platform for generating terahertz (THz) waves. In this paper, we present an all-dielectric metamaterial with multiple surface plasmon polariton (SPP) resonances for enhanced THz frequency mixing. The metamaterial is composed of graphene ribbons, a dielectric layer, and a one-dimensional photonic crystal, displaying the multiple absorptions with simultaneous excitation of three SPP resonances. Taking advantage of SPP resonances with high Q factor and strong localized field at the input frequency, the third-order nonlinear processes are remarkably enhanced, including third-harmonic generation (THG) and four-wave mixing (FWM), producing a variety of frequencies in the THz range. The proposed efficient nonlinear metamaterials offer promising applications for THz frequency synthesis.
History
Funder Name
Fundamental Research Funds for the Central Universities (AUGA5710012622); Fundamental Research Funds for the Central Universities (2023FRFK06002); 111 Project of Harbin Engineering University (B13015)