Localized surface plasmon resonance (LSPR) can enhance the optical field density around the nanostructure to improve devices’ light absorption. Aluminum nanoparticles (Al NPs) were introduced into solar-blind photodetectors with carbon dots (CDs) as a photosensitive material. It is found that by inserting Al NPs into the device, the switching ratio, responsivity, and external quantum efficiency reached 125.9, 0.511 A/W, and 2.16, respectively, which has obvious improvement compared with CDs based photodetector. The results indicate that Al NPs have an apparent optimization effect on the performance of the CDs photodetector by stimulating LSPR, which improves the photoresponse ability of CDs. It is illustrated by finite difference time-domain method that Al NPs can constraint the light field energy and successfully stimulate LSPR.

中文翻译：

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基于铝纳米粒子的局域表面等离子体增强碳点日盲紫外光电探测器

局域表面等离子体共振（LSPR）可以增强纳米结构周围的光场密度，从而提高器件的光吸收。铝纳米颗粒（Al NPs）被引入到以碳点（CD）作为光敏材料的日盲光电探测器中。结果发现，通过在器件中插入Al NPs，开关比、响应度和外量子效率分别达到125.9、0.511 A/W和2.16，与基于CD的光电探测器相比有明显的提高。结果表明，Al NPs通过刺激局域表面等离子体共振，对CDs光电探测器的性能有明显的优化作用，提高了CDs的光响应能力。时域有限差分法表明Al NPs可以约束光场能量并成功激发局域表面等离子体共振。