The dual-wavelength UV photodetector (PD) with sandwich structure of ZnO/Au/MgZnO/SiO₂ was fabricated and investigated with an emphasis on the effects of the Ag nanoparticles localized surface plasmons (LSPs). The results demonstrated that the modification in Ag nanoparticle (NP) position played a remarkable influence on the performance of dual-wavelength UV photodetectors. In comparison with decorating Ag NPs on the surface of the PDs, embedding Ag NPs between the MgZnO and ZnO films could improve two peak responsivities (caused by MgZnO and ZnO layers) significantly. By calculating the responsivities enhancement ratio of double layers (MgZnO and ZnO), the results indicated that the enhancement ratio of MgZnO is higher than that of ZnO. This was ascribed to LSPs of energy match with MgZnO which was superior to ZnO. This work described a creative method for increasing the performance of dual-wavelength UV PDs.

中文翻译：

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Ag纳米颗粒中的表面等离子体激元优化ZnO / Au / MgZnO / SiO 2夹层结构紫外光电探测器的性能

ZnO / Au / MgZnO / SiO ₂夹层结构的双波长紫外光电探测器（PD）制备并研究了Ag纳米颗粒局部表面等离激元（LSPs）的影响。结果表明，Ag纳米粒子（NP）位置的修饰对双波长紫外光电探测器的性能产生了显着影响。与在PD的表面上装饰Ag NP相比，将Ag NP嵌入MgZnO和ZnO膜之间可以显着提高两个峰响应度（由MgZnO和ZnO层引起）。通过计算双层（MgZnO和ZnO）的响应增强比，结果表明MgZnO的增强比高于ZnO。这是由于与MgZnO能量匹配的LSPs优于ZnO。这项工作描述了一种提高双波长UV PD性能的创新方法。