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- Title
Graphene-Based Cylindrical Pillar Gratings for Polarization-Insensitive Optical Absorbers.
- Authors
Kashif, Muhammad Fayyaz; Bianco, Giuseppe Valerio; Stomeo, Tiziana; Vincenti, Maria Antonietta; de Ceglia, Domenico; De Vittorio, Massimo; Scalora, Michael; Bruno, Giovanni; D'Orazio, Antonella; Grande, Marco
- Abstract
In this study, we present a two-dimensional dielectric grating which allows achieving high absorption in a monolayer graphene at visible and near-infrared frequencies. Dielectric gratings create guided-mode resonances that are exploited to effectively couple light with the graphene layer. The proposed structure was numerically analyzed through a rigorous coupled-wave analysis method. Effects of geometrical parameters and response to the oblique incidence of the plane wave were studied. Numerical results reveal that light absorption in the proposed structure is almost insensitive to the angle of the impinging source over a considerable wide angular range of 20°. This may lead to the development of easy to fabricate and experimentally viable graphene-based absorbers in the future.
- Subjects
OPTICAL gratings; LIGHT absorption; PLANE wavefronts; DIFFRACTION gratings; GRAPHENE
- Publication
Applied Sciences (2076-3417), 2019, Vol 9, Issue 12, p2528
- ISSN
2076-3417
- Publication type
Article
- DOI
10.3390/app9122528