In this letter, we proposed an advanced dual-band detector based on the plasmonic response of patterned graphene integrated on a gold array. The photodetector shows ultra-high photoresponse performance in both visible light (0.4–0.7μm) and mid-infrared (4–14μm) light. The highest achievable responsivity of 2.7AW⁻¹ is comparable with typical visible and mid-infrared photodetectors. The working wavelength can be tuned by changing the external gate voltage bias, the dimension of graphene, and the architecture of the gold array. The demonstration of a surface plasmon resonance enhanced detector brings us a step closer to high sensitivity room-temperature multiband devices.

在这封信中，我们基于集成在金阵列上的图案化石墨烯的等离子体响应，提出了一种先进的双波段检测器。在两个可见光（0.4-0.7光电检测器示出了超高光响应性能μ M）和中红外（4-14 μ米）光。2.7AW ^-1可获得的最高响应度可与典型的可见光和中红外光电探测器相媲美。可以通过更改外部栅极电压偏置，石墨烯的尺寸以及金阵列的结构来调整工作波长。表面等离子体激元共振增强检测器的演示使我们更接近于高灵敏度的室温多频带设备。