A dual-band absorption enhancement of monolayer molybdenum disulfide (MoS 2 ) by a tapered metamaterial waveguide slab (TMWS) is presented. Due to the gradient width of TMWS, double absorption bands of monolayer MoS 2 can be enhanced simultaneously via the fundamental waveguide mode resonance. The correlation between the selective absorption performances of the TMWS-based absorber and the resonant waveguide modes can be evaluated by using the impedance theory and the planar waveguide model. In addition, the influence of the structural parameters of the TMWS on the absorption spectra of the monolayer MoS 2 is systematically studied.

中文翻译：

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锥形超材料波导平板增强单层二硫化钼的双频吸收

提出了锥形超材料波导平板（TMWS）对单层二硫化钼（MoS 2）的双波段吸收增强。由于TMWS的梯度宽度，可以通过基本的波导模式共振同时增强单层MoS 2的双吸收带。可以通过使用阻抗理论和平面波导模型来评估基于TMWS的吸收器的选择性吸收性能与谐振波导模式之间的相关性。另外，系统地研究了TMWS的结构参数对单层MoS 2吸收光谱的影响。