Due to their unique photoelectric properties, two-dimensional (2D) semiconductors have recently attracted much attention as active elements in optoelectronic devices. However, the effectiveness of such devices is limited by the high transparency of 2D semiconductor films, which leads to a photosensitivity decrease. An increase in the electric field due to the local plasmons excitation is a widely used effect for maximizing absorption in thin films and improving the efficiency of optoelectronic devices based on them. Here we report a 10-fold photosensitivity enhancement of photodetectors based on 2D semiconductor WSe₂ due to the ordered silver plasmonic structures.

由于其独特的光电特性，二维 (2D) 半导体最近作为光电器件中的有源元件备受关注。然而，这种器件的有效性受到二维半导体薄膜的高透明度的限制，导致光敏度下降。由于局部等离子体激发而增加电场是一种广泛使用的效应，可最大限度地提高薄膜中的吸收并提高基于它们的光电器件的效率。在这里，我们报告了由于有序的银等离子体结构，基于二维半导体 WSe ₂的光电探测器的 10 倍光敏度增强。