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arXiv 1410.2102physics.optics
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利用一维光栅中的导模共振的石墨烯基吸收体

Graphene-based absorber exploiting guided mode resonances in one-dimensional gratings

M. Grande, M. A. Vincenti, T. Stomeo, G. V. Bianco, D. de Ceglia, N. Akozbek, V. Petruzzelli, G. Bruno, M. De Vittorio, M. Scalora, A. D Orazio

摘要:

提出并研究了一种基于简单几何结构的一维介质光栅,利用导模共振增强单层石墨烯的光吸收。数值结果表明,优化的配置是能够吸收高达60%的入射光在法向入射的TE和TM偏振导致在理论上的增强因子约为26相对于单层石墨烯吸收(约2.3%)。实验结果证实了这种行为,显示CVD石墨烯吸收峰在几纳米的窄带上高达约40%。这种简单灵活的设计为实现创新、可扩展和易于制造的石墨烯基光吸收剂铺平了道路。

英文摘要:

A one-dimensional dielectric grating, based on a simple geometry, is proposed and investigated to enhance light absorption in a monolayer graphene exploiting guided mode resonances. Numerical findings reveal that the optimized configuration is able to absorb up to 60% of the impinging light at normal incidence for both TE and TM polarizations resulting in a theoretical enhancement factor of about 26 with respect to the monolayer graphene absorption (about 2.3%). Experimental results confirm this behaviour showing CVD graphene absorbance peaks up to about 40% over narrow bands of few nanometers. The simple and flexible design paves the way for the realization of innovative, scalable and easy-to-fabricate graphene-based optical absorbers.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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