【摘要】 提出一种由石墨烯和金属铝构成的复合结构的太赫兹超表面生物传感器。超表面由金属铝结构形成类电磁诱导透明谐振，并在铝结构表面通过湿法转移一层石墨烯。通过对石墨烯掺杂蚕丝蛋白来改变石墨烯费米能级，从而改变传感器透射光谱的振幅。实验结果表明，该传感器的检测极限可以达到0.35 ng/mL。利用石墨烯狄拉克点的电磁波调控特性和耦合模型对传感器的工作原理进行分析。在生物医学领域，该生物传感器为微量蛋白的高灵敏检测提供了一种方法。更多还原

【Abstract】 This paper describes a terahertz metasurface biosensor with a graphene and metallic aluminum composite structure. The aluminum structure is designed to form an electromagnetically induced transparency-like resonance. A layer of wet graphene is transferred onto the structure. The Fermi energy level of the graphene is controlled by the incorporation of silk proteins into the graphene, which causes the amplitude of the sensor’s transmission spectrum to change. The experiment reveals that the detection limit is 0. 35 ng/mL. The sensor is analyzed using the electromagnetic wave regulation characteristics of the Dirac point of graphene, as well as the coupling model. This biosensor enables the highly sensitive detection of trace proteins in the biomedical field.更多还原