Plasmon-enhanced absorption in dielectric layer coated III-V nanowire array decorated with nanoparticles

IF 3.8 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Optical Materials Pub Date : 2025-03-10 DOI:10.1016/j.optmat.2025.116922

Hanchen Zhu , Yanmeng Chu , Fuxiang Shang , Linjun Zhang , Yunqi Chen , Haodong Wang , ZhouXiang Chen , Qichao Hou , Lulu Chen , Weiou Qin , Zhiyuan Cheng , Yunyan Zhang

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引用次数: 0

Abstract

The group III-V nanowires (NWs) have broad prospects in the field of photoelectric detection, among which GaN and InN NWs are promising candidates for ultraviolet (UV) and short-wave infrared (SWIR) photodetectors but have rarely been studied in depth. Furthermore, there is a lack of research on the further improvement of their photoelectric performance. In this research, we introduce a thin dielectric layer in the structure of nanowire array decorated with metal nanoparticles (NPs) for the first time, demonstrating how dielectric layer between NWs and NPs further improve light absorption efficiency. Surface plasmons (SPs) excited by NPs, along with the dielectric layer which can concentrate the incident light, result in obvious enhancement of the absorption rate, the rationality of this design is supported by the calculation results in both ultraviolet UV and SWIR range. For GaN NWs, light absorption rate can be increased from 76 % to 96 % near 335 nm and for InN NWs the peak of absorption curve rises from 49 % to 97 % near 1550 nm. The simulation results will provide a reference for improving the performance of photodetectors.

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来源期刊

Optical Materials 工程技术-材料科学：综合

CiteScore

6.60

自引率

12.80%

发文量

1265

审稿时长

38 days

期刊介绍： Optical Materials has an open access mirror journal Optical Materials: X, sharing the same aims and scope, editorial team, submission system and rigorous peer review. The purpose of Optical Materials is to provide a means of communication and technology transfer between researchers who are interested in materials for potential device applications. The journal publishes original papers and review articles on the design, synthesis, characterisation and applications of optical materials. OPTICAL MATERIALS focuses on: • Optical Properties of Material Systems; • The Materials Aspects of Optical Phenomena; • The Materials Aspects of Devices and Applications. Authors can submit separate research elements describing their data to Data in Brief and methods to Methods X.