Ultrabroadband, More than One Order Absorption Enhancement in Graphene with Plasmonic Light Trapping

• DOI: 10.1038/srep16998
• Publication Date: 2015-11-19T10:25:27Z
• Authors: Feng Xiong; Jianfa Zhang; Zhihong Zhu; Xiaodong Yuan; Shiqiao Qin
• Keywords: Plasmonic solar cell

This paper presents an comprehensive study of light trapping and absorption enhancement in graphene through metallic plasmonic structures shows a strategy to realize both ultrabroadband strong enhancement. Three different absorber designs are investigated by numerical simulations. The excitation localized plasmons the significantly enhances interactions between at resonances. By employing splitted cross design for resonant antennas integrating two types sub-antennas with sizes, more than 30% optical monolayer is realized ultrabroad spectral range from 780 1760 nm. functionality can be translated any wavelength band ultraviolet terahertz ranges modifying geometric structure applied other dimensional materials their heterogeneous structures. It may improve efficiency devices such as broadband photodetectors solar cells based on two-dimensional materials.