Abstract:
Near-infrared photodetectors are widely used in night vision, biomedical, environmental monitoring and many other fields. Two-dimensional graphene have great potential in infrared detection due to their unique properties (Zero band gap structure, high carrier mobility, adjustable work function). In order to take full advantage of graphene and overcome its disadvantages of low absorption and high noise, the researchers designed the hybrid structure using localized modulation of grating to improve the infrared detector performance. The research results of localized field enhanced graphene-based near-infrared photodetector were summarized, the localized field enhanced devices with single absorption layer was introduced, and the advantages and disadvantages of devices based on different types of photosensitive materials were analyzed. The double absorption layer local field enhanced device was further introduced, and the current polarity and other related researches of the research group in the field of double absorption layer devices was summarized. Finally, the research on the extension of the localized field enhanced detector was introduced, and the development trend of this kind of devices was briefly summarized and prospected.