【摘要】 提出一种基于Au-ZnO-Au三明治结构的可见光频段完美光吸收体结构.采用COMSOL有限元法对所提出的完美吸收体结构的光学特性进行模拟仿真，研究金属层、介质层和顶部金属光栅层的厚度以及光栅的宽度和周期等结构参数对其光学性质的影响规律.研究结果表明，当光栅周期为450 nm、光栅宽度为100 nm、光栅层厚度为60 nm、ZnO层厚度为20 nm且Au层厚度为80 nm时，完美吸收体结构在508 nm波长处的结构阻抗Z_Stru与真空阻抗Z_Vac达到理想匹配，且器件的最大光吸收率达100%,实现对该波段可见光的完美吸收.更多还原

【Abstract】 We proposed an optically perfect absorber（Au-ZnO-Au） in visible light band based on the Au-ZnO-Au sandwiched structures.The optical properties of the proposed perfect absorber structure were simulated by COMSOL finite element method.The impact of structural parameters including the thickness of the metal, insulator, and the grating layers as well as the width and period of the gratings on the optical property were studied.The results show that the device exhibit perfect impedance matching between the structural impedance Z_Stru and the vacuum impedance and show perfect absorbing performance towards visible light with wavelength of 508 nm, when the period of the grating layer is 450 nm, together with the grating width, thickness, ZnO thickness and Au thickness of 100 nm, 60 nm, 20 nm, and 80 nm, respectively. The maximum absorbance reached up to 100% at that condition.更多还原