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The amplification spectrum of terahertz radiation in a double-layer active graphene nanostructure, which is two identical periodic arrays of graphene microribbons separated by a thin dielectric barrier layer, is theoretically investigated. The system in question supports optical and acoustic plasmon modes. The resonance frequencies of the optical and acoustic modes change in the opposite way with a change in the thickness of the insulating dielectric barrier layer, which makes the anticrossing regime of plasmon modes possible. It is shown that the investigated graphene structure exhibits a strong plasmon response and a giant amplification of terahertz radiation at the two plasma resonance frequencies in the vicinity of the anticrossing regime between optical and acoustic plasmon modes at room temperature. Физика и техника полупроводников, 2019, том 53, вып. 9

fizika i tehnika poluprovodnikov

Усиление терагерцового излучения высокодобротными резонансными плазмонами в двухслойной периодической структуре на основе графена в режиме антикроссинга плазмонных мод