Monolayer-graphene-based broadband and wide-angle perfect absorption structures in the near infrared

被引：61
|
作者：
Fan, Yansong [1 ]
Guo, Chucai [1 ]
Zhu, Zhihong [1 ,2 ]
Xu, Wei [1 ]
Wu, Fan [1 ]
Yuan, Xiaodong [1 ]
Qin, Shiqiao [1 ,2 ]
机构：
[1] Natl Univ Def Technol, Coll Adv Interdisciplinary Studies, Changsha 410073, Hunan, Peoples R China
[2] Natl Univ Def Technol, State Key Lab High Performance Comp, Changsha 410073, Hunan, Peoples R China
来源：
SCIENTIFIC REPORTS | 2018年 / 8卷
基金：
中国国家自然科学基金;
关键词：
LIGHT-ABSORPTION; ENHANCEMENT; PLASMONICS; ABSORBER; PHOTONICS; LAYER;
D O I：
10.1038/s41598-018-32052-7
中图分类号：
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号：
07 ; 0710 ; 09 ;
摘要：
Broadband optical absorption structures in the near infrared by coupling monolayer-graphene with periodical metal structures are proposed and demonstrated numerically. Optical absorption of graphene with over-50%-absorption bandwidth up to hundreds of nanometer caused by magnetic dipole resonances and magnetic coupling effect are investigated in detail, and the demonstrated bandwidths are one order higher than those caused by dielectric guiding mode resonances. In addition, the influences of geometrical parameters of structures are fully analyzed and these demonstrated structures show angular-insensitive absorption for oblique incidence in a large angular range. The demonstrated absorption structures in this work provide new design ideas in the realization of advanced graphene-based optoelectronic devices.
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收藏
页数：8
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