Photodetectors are widely used in communication,detection,medical and other fields.With the development of industries such as aerospace,night vision,remote sensing,thermal imaging,automotive interconnection and consumer electronics,the demand for ultra-wideband photodetectors is increasing.Existing ultrawide band detectors are multiple photodetectors using different materials and different detection bands,which are poorly integrated and restrict the development of the above applications.We design a graphene micron strip-metal grating composite structure photodetector.It provides a photoelectric response in the terahertz,infrared and visible spectral regions.In the visible region,the metal grating significantly increased the detection sensitivity from 1.1 mA/W to 2.5 mA/W.This work provides new ideas for the design of graphene-based ultra-wideband photodetectors.
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维普
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