Extraordinary absorption of decorated undoped graphene

Abstract

We theoretically study absorption by an undoped graphene layer decorated with arrays of small particles. We discuss periodic and random arrays within a common formalism, which predicts a maximum absorption of $50\%$ for suspended graphene in both cases. The limits of weak and strong scatterers are investigated and an unusual dependence on particle-graphene separation is found and explained in terms of the effective number of contributing evanescent diffraction orders of the array. Our results can be important to boost absorption by single layer graphene due to its simple setup with potential applications to light harvesting and photodetection based on energy (Förster) rather than charge transfer.

5 pages, 3 figures

References in corpus (6)

• Universal Dynamic Conductivity and Quantized Visible Opacity of Suspended Graphene
• Measurement of the Optical Conductivity of Graphene
• The optical conductivity of graphene in the visible region of the spectrum
• Exact solution for square-wave grating covered with graphene: Surface plasmon-polaritons in the THz range
• Graphene plasmons and retardation: strong light-matter coupling
• Transverse current current response of graphene at finite temperature, plasmons and absorption

Cited by in corpus (10)

• Broadband Tunable THz Absorption with Singular Graphene Metasurfaces
• Resonant Visible Light Modulation with Graphene
• Current-induced birefringent absorption and non-reciprocal plasmons in graphene
• Graphene, plasmons and transformation optics
• Tunable subwavelength strong absorption by graphene wrapped dielectric particles
• Bianisotropy and magnetism in plasmonic gratings
• Impact of graphene on the polarizability of a neighbour nanoparticle: a dyadic Green's function study
• Renormalization of nanoparticle polarizability in the vicinity of a graphene-covered interface
• Probing graphene χ(2) using a gold photon sieve
• Hidden symmetries in plasmonic gratings