Cheng Xueling, Wang Yunshan
Department of Electrical and Computer Engineering, University of Utah, Salt Lake City, UT, 84112, USA.
Department of Chemical Engineering, University of Utah, Salt Lake City, UT, 84112, USA.
Sci Rep. 2021 Apr 19;11(1):8516. doi: 10.1038/s41598-021-87868-7.
Optoelectronic devices in the UV range have many applications including deep-UV communications, UV photodetectors, UV spectroscopy, etc. Graphene has unique exciton resonances, that have demonstrated large photosensitivity across the UV spectrum. Enhancing UV absorption in graphene has the potential to boost the performance of the various opto-electronic devices. Here we report numerical study of UV absorption in graphene on aluminum and magnesium hole-arrays. The absorption in a single-layer graphene on aluminum and magnesium hole-arrays reached a maximum value of 28% and 30% respectively, and the absorption peak is tunable from the UV to the visible range. The proposed graphene hybrid structure does not require graphene to be sandwiched between different material layers and thus is easy to fabricate and allows graphene to interact with its surroundings.
紫外波段的光电器件有许多应用，包括深紫外通信、紫外光电探测器、紫外光谱学等。石墨烯具有独特的激子共振，已证明其在整个紫外光谱范围内具有很大的光敏性。增强石墨烯中的紫外吸收有潜力提高各种光电器件的性能。在此，我们报告关于铝和镁孔阵列上石墨烯中紫外吸收的数值研究。铝和镁孔阵列上单层石墨烯中的吸收分别达到最大值28%和30%，且吸收峰可从紫外范围调谐到可见光范围。所提出的石墨烯混合结构不需要将石墨烯夹在不同材料层之间，因此易于制造，并使石墨烯能够与其周围环境相互作用。
