Narrow-band enhanced absorption of monolayer graphene at near-infrared (NIR) sandwiched by dual gratings

被引：14
|
作者：
Zheng, Gaige [1 ,2 ]
Zhang, Haojing [1 ]
Bu, Lingbing [3 ]
机构：
[1] Nanjing Univ Informat Sci & Technol, Sch Phys & Optoelect Engn, Nanjing 210044, Jiangsu, Peoples R China
[2] Nanjing Univ Informat Sci & Technol, Jiangsu Collaborat Innovat Ctr Atmospher Environm, Nanjing 210044, Jiangsu, Peoples R China
[3] Nanjing Univ Informat Sci & Technol, Key Lab Meteorol Disaster, Minist Educ, Nanjing 210044, Jiangsu, Peoples R China
来源：
PLASMONICS | 2017年 / 12卷 / 02期
基金：
中国国家自然科学基金;
关键词：
Monolayer graphene; Light absorption; Near-infrared; Rigorous coupled-wave analysis; TRANSPARENCY;
D O I：
10.1007/s11468-016-0260-z
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
One possibility of enhancing light absorption in monolayer graphene at near-infrared (NIR) wavelength region with grating structures is proposed and investigated. It is demonstrated that it is possible to achieve near-perfect absorption when a single monolayer graphene is sandwiched between two gratings with optimized geometric parameters at normal incidence for transverse electric (TE) polarization. By means of the rigorous coupled-wave analysis (RCWA), the effects of technological tolerances on the optical response of the structure by varying geometric parameters and incident angle are studied. The proposed photonic structure could be efficiently exploited as a building block for innovative optical absorbers or photodetectors in combination with active materials.
引用
收藏
页码：271 / 276
页数：6
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