Low-loss plasmonic supermodes in graphene multilayers

被引：41
|
作者：
Qin, Chengzhi [1 ,2 ]
Wang, Bing [1 ,2 ]
Huang, He [1 ,2 ]
Long, Hua [1 ,2 ]
Wang, Kai [1 ,2 ]
Lu, Peixiang [1 ,2 ]
机构：
[1] Huazhong Univ Sci & Technol, Wuhan Natl Lab Optoelect, Wuhan 430074, Peoples R China
[2] Huazhong Univ Sci & Technol, Sch Phys, Wuhan 430074, Peoples R China
来源：
OPTICS EXPRESS | 2014年 / 22卷 / 21期
基金：
中国国家自然科学基金; 高等学校博士学科点专项科研基金;
关键词：
WAVE-GUIDES; TRANSFORMATION OPTICS; METAL-SURFACE; SHEET ARRAYS; POLARITONS; ABSORBER; NANOWIRE; COUPLERS; FIGURES; MERIT;
D O I：
10.1364/OE.22.025324
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
We investigate the supermodes in arbitrary layers of graphene sheets, which are collective guided modes formed by coupling of surface plasmon polaritons (SPPs) in each graphene sheet. In terms of the dispersion relation, we analyse the effective indexes and mode profiles of the supermodes. Numerical simulations reveal that the supermodes can be well approximated by linear superposition of SPPs in individual graphene sheets. Among all the possible supermodes, there is an interesting one possessing both lowest propagation loss and shortest mode wavelength. The loss of the supermode decreases as the number of layers increases and saturates at about 5 layers. The graphene multilayers may find potential applications in low-loss plasmonic waveguides and so constructed optical devices. (C) 2014 Optical Society of America
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页码：25324 / 25332
页数：9
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