材料科学
光电探测器
光电子学
石墨烯
等离子体子
肖特基势垒
硅
表面等离子共振
肖特基二极管
纳米技术
纳米颗粒
二极管
作者
Li Wang,Shu-Juan He,Kui-Yuan Wang,He-Hao Luo,Jigang Hu,Yongqiang Yu,Chao Xie,Chunyan Wu,Lin‐Bao Luo
出处
期刊:Nanotechnology
[IOP Publishing]
日期:2018-10-11
卷期号:29 (50): 505203-505203
被引量:9
标识
DOI:10.1088/1361-6528/aae360
摘要
High-performance photodetectors are desirable for various applications, including multi-wavelength image sensing, communication, and safety monitoring. In this study, we report the construction of a dual-surface plasmon-enhanced silicon Schottky photodetector using Au nanoparticles (NPs)/graphene/Au NPs hybrid structure as the electrode. It was found that the as-assembled device exhibited broad sensitivity, ranging from ultraviolet to near-infrared light (360-1330 nm) at room temperature, with a high response speed of 360 ns and a 3 dB bandwidth of 780 kHz at zero bias. Further theoretical simulation based on the finite-element method revealed that good device performance is associated with the contribution of the Au NPs/graphene/Au NPs electrode: intense dual-plasmonic resonance coupling is induced in a hybrid structure of two layers of metallic NPs separated by a uniform monolayer graphene. It not only can enhance light trapping and the localized electric field at the resonant and off-resonant wavelength regions, but is also beneficial for the tunneling of hot electrons. This work demonstrated the great potential of dual-plasmonic resonance coupling in optoelectronic devices and will lead to the development of advanced plasmonic devices.
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