Here we present a graphene photodetector ofwhich the graphene and structural system infraredabsorptions are enhanced by interface phonon polariton(IPhP) coupling. IPhPs are supported at the SiC/AlNinterface of device ...Here we present a graphene photodetector ofwhich the graphene and structural system infraredabsorptions are enhanced by interface phonon polariton(IPhP) coupling. IPhPs are supported at the SiC/AlNinterface of device structure and used to excite interbandtransitions of the intrinsic graphene under gated-fieldtuning. The simulation results show that at normalincidence the absorbance of graphene or system reachesup to 43% or closes to unity in a mid-infrared frequencyrange. In addition, we found the peak-absorption frequencyis mainly decided by the AlN thickness, and it has ared-shift as the thickness decreases. This structure has greatapplication potential in graphene infrared detectiontechnology.展开更多
基金the National NaturalScience Foundation of China (NSFC) (Grant No. 61675080)FundamentalResearch Funds for the Central Universities (HUST: 2016YXMS021).
文摘Here we present a graphene photodetector ofwhich the graphene and structural system infraredabsorptions are enhanced by interface phonon polariton(IPhP) coupling. IPhPs are supported at the SiC/AlNinterface of device structure and used to excite interbandtransitions of the intrinsic graphene under gated-fieldtuning. The simulation results show that at normalincidence the absorbance of graphene or system reachesup to 43% or closes to unity in a mid-infrared frequencyrange. In addition, we found the peak-absorption frequencyis mainly decided by the AlN thickness, and it has ared-shift as the thickness decreases. This structure has greatapplication potential in graphene infrared detectiontechnology.
