Enhanced absorption of graphene strips with a multilayer subwavelength grating structure
Enhanced absorption of graphene strips with a multilayer subwavelength grating structure
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多层亚波长光栅结构增强石墨烯条的吸收
DOI：
10.1063/1.4903491
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发表时间：
2014-12-01
影响因子：
4
通讯作者：
Ren, Xiao-Min
中科院分区：
文献类型：
--
作者：
Hu, Jin-Hua;Huang, Yong-Qing;Ren, Xiao-Min
研究了多层亚波长光栅（MSG）表面覆盖石墨烯带的光吸收特性。在1500 nm ~ 1600 nm波长范围内，含MSG的石墨烯条的吸收通过临界耦合得到增强，这与MSG的引导共振及其光子带隙效应的综合效应有关。在不改变MSG结构参数的情况下，通过调节入射角可以控制石墨烯条的临界耦合。石墨烯带的吸收也可以通过改变关键参数来调节，例如光栅周期、带宽度和入射角。
The optical absorption of graphene strips covered on a multilayer subwavelength grating (MSG) surface is theoretically investigated. The absorption of graphene strips with MSG is enhanced in the wavelength range of 1500 nm to 1600 nm by critical coupling, which is associated with the combined effects of a guided resonance of MSG and its photonic band gap effect. The critical coupling of the graphene strips can be controlled by adjusting the incident angle without changing the structural parameters of MSG. The absorption of graphene strips can also be tuned by varying key parameters, such as grating period, strip width, and incident angle.