基于石墨烯的利用导模共振的完美光学吸收器。

Graphene-based perfect optical absorbers harnessing guided mode resonances.

作者信息

Grande M, Vincenti M A, Stomeo T, Bianco G V, de Ceglia D, Aközbek N, Petruzzelli V, Bruno G, De Vittorio M, Scalora M, D'Orazio A

出版信息

Opt Express. 2015 Aug 10;23(16):21032-42. doi: 10.1364/OE.23.021032.

DOI:10.1364/OE.23.021032

PMID:26367955

Abstract

We investigate graphene-based optical absorbers that exploit guided mode resonances (GMRs) attaining theoretically perfect absorption over a bandwidth of few nanometers (over the visible and near-infrared ranges) with a 40-fold increase of the monolayer graphene absorption. We analyze the influence of the geometrical parameters on the absorption rate and the angular response for oblique incidence. Finally, we experimentally verify the theoretical predictions in a one-dimensional, dielectric grating by placing it near either a metallic or a dielectric mirror, thus achieving very good agreement between numerical predictions and experimental results.

摘要

我们研究了基于石墨烯的光学吸收器，其利用导模共振（GMRs）在几纳米的带宽（在可见光和近红外范围内）实现理论上的完美吸收，单层石墨烯的吸收率提高了40倍。我们分析了几何参数对吸收率和斜入射角度响应的影响。最后，我们通过将一维介电光栅放置在金属镜或介质镜附近，在实验上验证了理论预测，从而在数值预测和实验结果之间取得了非常好的一致性。