Perfect absorption is key to achieving high responsivity of a thin-film photodetector. Here, we report the effect of a metamaterial perfect absorber on the external quantum efficiency of plasmonic photo-thermoeletric conversion, which is a photodetection method based on local heating. The photodetector with a metamaterial perfect absorber shows strong absorption, resulting in external quantum efficiency about three times of that of a control device. Plasmon-induced local temperature rise contributes to the photodetection, and its amplitude is examined both experimentally and numerically.

中文翻译：

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超材料完美吸收器增强等离子体光热电转换

完美的吸收是实现薄膜光电探测器高响应度的关键。在这里，我们报告了超材料完美吸收器对等离子体光热电转换的外部量子效率的影响，这是一种基于局部加热的光电检测方法。具有超材料完美吸收体的光电探测器表现出强吸收，导致外部量子效率约为控制器件的三倍。等离子激元引起的局部温度升高有助于光电探测，并且通过实验和数值方法检查其幅度。