Infrared absorption enhancement by coupling effect between graphene and sandwiched metamaterial
Photodetectors play an important role in military,communication,and imaging fields.Currently,designing high-performance photodetectors by integrating novel metamaterial with two dimensional material gra-phene is a hot topic in related research.Based on this situation,a hybrid structure composed by graphene nanorib-bon filled in Metal/Dielectric/Metal(MDM)metamaterial is designed,and coupling effect between magnetic plasmon resonance excited in MDM structure and graphene plasmon is investigated.The absorptivity and electro-magnetic field distribution of the hybrid structure were numerically solved using rigorous coupled wave method(RCWA),while the influence of structural parameters on absorption was also studied.Absorptivity of the hybrid structure can be actively regulated through adjusting the chemical potential of graphene.More importantly,tun-able dual-band absorption enhancement was fulfilled by harnessing the strong coupling effect between graphene na-noribbon plasmon and magnetic plasmon.
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维普
