We reported a MoS/MoTe heterostructure with Au nanoparticles (Au NPs) using mechanical exfoliation and capillary-assisted particle assembly method. The photodetection properties of the heterostructure were significantly enhanced by the localized surface plasmon polaritons effect induced by the Au NPs. The results reveals that the maximum responsivity of the MoS/MoTe heterostructure with Au NPs is 2771.998 A W under light wavelength of 520 nm, which is higher than that of the as-fabricated heterostructure without Au NPs. Additionally, the increase of the photocurrent of the Au NPs/MoS/MoTe heterostructure could be observed under visible to near-infrared light, reaching 10 A at 405 nm. Surface plasmon resonance enhances the local electric field on the surface of the MoS/MoTe heterostructure, resulting in strongly improved light−material interaction and abundant hot electron doping from Au-NPs to heterostructure. The proposed structure offers a promising approach to enhance the photoelectric conversion of two-dimensional materials for advanced optoelectronic devices.

中文翻译：

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通过局域表面等离子体效应增强的高灵敏度MoS2/MoTe2异质结构，用于广谱光电检测

我们使用机械剥离和毛细管辅助颗粒组装方法报道了具有金纳米颗粒（Au NP）的MoS/MoTe异质结构。Au NP 引起的局域表面等离子体激元效应显着增强了异质结构的光电检测性能。结果表明，含Au NPs的MoS/MoTe异质结构在520 nm光波长下的最大响应度为2771.998 AW，高于未制备的不含Au NPs的异质结构。此外，在可见光到近红外光下可以观察到Au NPs/MoS/MoTe异质结构的光电流增加，在405 nm处达到10 A。表面等离子体共振增强了MoS/MoTe异质结构表面的局域电场，从而大大改善了光与材料的相互作用以及从Au-NPs到异质结构的丰富的热电子掺杂。所提出的结构为增强先进光电器件的二维材料的光电转换提供了一种有前途的方法。