材料科学
光电探测器
纳米线
光电子学
纳米结构
等离子体子
紫外线
复合数
表面等离子共振
半导体
光探测
纳米复合材料
纳米技术
纳米颗粒
复合材料
作者
Jing Li,Xin Xi,Xiaodong Li,Shan Lin,Zhanhong Ma,Huixin Xiu,Lixia Zhao
标识
DOI:10.1002/adom.201902162
摘要
Abstract Composite nanostructures with plasmonic metals can introduce optical resonances and enhance optoelectronic performance significantly. In this work, novel lateral porous GaN/Ag nanowires (NWs) composite nanostructure‐based UV photodetectors were designed and fabricated, and the detectivity is up to 10 15 Jones at V = 1 V with a fast response speed of ≈180 µs under UV illumination, which is more than ≈10 5 times faster than that of the photodetectors without Ag NWs. Combined with finite‐difference time‐domain simulations, the results show that such superior performance is mainly attributed to the surface plasmon resonance effect, which leads to a strong light trapping and efficient carriers' transport process at the lateral porous GaN/Ag NWs interfaces. This approach paves a way to realize ultra‐sensitive UV photodetectors with fast response through plasmonic metal/semiconductor nanocomposites, which are desirable for applications in optical switches, optical logical operations, and lightwave communications.
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