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arXiv · 1410.2102

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
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Abstract

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.

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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. 2014-10-08. Graphene-based absorber exploiting guided mode resonances in one-dimensional gratings. https://doi.org/10.1364/oe.22.031511

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