GaAs nanowires(NWs)are ideal materials for preparing near-infrared photodetectors owing to their high charge carrier mobility and direct band gap.Although the performance of GaAs NW photodetectors can be enhanced by s...GaAs nanowires(NWs)are ideal materials for preparing near-infrared photodetectors owing to their high charge carrier mobility and direct band gap.Although the performance of GaAs NW photodetectors can be enhanced by surface passivation or doping,it still cannot meet the requirement for applications.In this paper we propose a method to greatly improve the performances of GaAs NW photodetectors by hot-hole injection via surface plasmon polaritons.In this case,the responsivity of a single GaAs NW photodetector is increased by a fact of 3.2 to 6.56 A·W^(-1) by attaching capsulelike Au nanoparticles to its surface.This research uses an efficient route to improve the NW photocurrent,which is also important for the development of a high-performance near-infrared NW photodetecor.展开更多
基金Project supported by the National Natural Science Foundation of China(Grant Nos.62074018,12074045,61904017and 11804335)the Developing Project of Science and Technology of Jilin Province,China(Grant No.20200301052RQ)the Project of Education Department of Jilin Province,China(Grant Nos.JJKH20200763KJ and JJKH20210831KJ)。
文摘GaAs nanowires(NWs)are ideal materials for preparing near-infrared photodetectors owing to their high charge carrier mobility and direct band gap.Although the performance of GaAs NW photodetectors can be enhanced by surface passivation or doping,it still cannot meet the requirement for applications.In this paper we propose a method to greatly improve the performances of GaAs NW photodetectors by hot-hole injection via surface plasmon polaritons.In this case,the responsivity of a single GaAs NW photodetector is increased by a fact of 3.2 to 6.56 A·W^(-1) by attaching capsulelike Au nanoparticles to its surface.This research uses an efficient route to improve the NW photocurrent,which is also important for the development of a high-performance near-infrared NW photodetecor.
