▎ 摘　　要

A sandwich structure constituting graphene and hyperbolic metamaterial (HMM) that is made of silicon carbide (SiC) nanowires is proposed to study the spontaneous emission of quantum emitter. Compared with that occurring only in the hyperbolic bands near the single HMM, the enhancement of spontaneous emission of quantum emitter near the sandwich can emerge both in and out of the hyperbolic bands. The superradiance of two quantum emitters connected by the sandwich structure in the transmission configuration has also been studied in detail. The superradiance can also be attained both in and out of the hyperbolic bands in a broad frequency range. When the distance between two quantum emitters becomes larger, the superradiance still exists by actively controlling the chemical potential of graphene. The results obtained in this study are not only meaningful for modulating the interaction between atoms or quantum emitters, but also helpful in studying the light-matter interaction.