Circular dichroism (CD) effect of chiral nanostructures has been studied for many years. Most of those CD effects are always generated by the elaborately designed chiral nanostructure which partly narrow the application of CD effect. In this work, the CD effect of an achiral metal nanostructure was induced by a graphene grating which modulates the CD effect flexibly by changing its Fermi energy. Calculated results show as the Fermi energy of graphene grating increased, the induced CD effect of metal nanostructure was blue-shifted. Meanwhile, spectra of the graphene-metal nanostructure system exhibit Electromagnetically Induced Transparency (EIT) like behavior. Furthermore, the Quality factor of both EIT-like behavior and CD modes can be optimized by adjusting the geometrical parameters of graphene grating. This study demonstrates a remarkable design for generating and modulating CD effect, which broadens the applications of CD effect significantly.

手性纳米结构的圆二色性 (CD) 效应已被研究多年。大多数CD效应总是由精心设计的手性纳米结构产生，这在一定程度上限制了CD效应的应用。在这项工作中，非手性金属纳米结构的 CD 效应是由石墨烯光栅诱导的，该光栅通过改变其费米能量来灵活地调节 CD 效应。计算结果表明，随着石墨烯光栅费米能量的增加，金属纳米结构的诱导CD效应发生蓝移。同时，石墨烯-金属纳米结构系统的光谱表现出类似电磁诱导透明 (EIT) 的行为。此外，可以通过调整石墨烯光栅的几何参数来优化类 EIT 行为和 CD 模式的品质因数。