Abstract

Abstract Using molybdenum disulfide (MoS2), in this paper, two types of broadband multi-layer and multi-ribbon structures with the minimum absorption of 90% are proposed, in the terahertz regime. First, we study the multi-resonance behavior of the proposed multi-layer structure. Then, we investigate the effect of the number and thickness of the layers and their intrinsic carrier density. In the next step, we introduce an optimized three-layer structure with at least 90% absorption within 1.2 THz bandwidth. Finally, with the goal of bandwidth increase, a new type of multi-ribbon periodic structures consisting of MoS2 ribbons with different intrinsic carrier densities is designed. As a result, two optimized structures with three and four-ribbon arrangements are introduced with a minimum of 90% absorption within 3.3 and 5.64 THz bandwidth, respectively.

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