Dual broadband infrared absorptance enhanced by magnetic polaritons using graphene-covered compound metal gratings

Gold nanoparticle mediated graphene plasmon for broadband enhanced infrared spectroscopy.

Graphene plasmonics, with dynamic tunable resonance wavelength, has been successfully used in broadband plasmon-enhanced infrared spectroscopy. However, the requirement for external voltage loading makes the practical application sophisticated. In this work, the hybrid structure of graphene nanodot array (GNA) and gold nanoparticles (AuNPs) has been proposed as a passive platform for broadband ...

Effective medium theory for graphene-covered metallic gratings

We propose an effective medium theory for a one-dimensional periodic array of rectangular grooves covered by a graphene sheet. Parameters of the effective medium model are given by explicit analytical expressions for both major polarizations TM and TE, and for all incident angles. In extraction of this model, we assumed single mode approximation inside the grooves. The effect of non-specular di...

Strong Plasmonic Coupling between Graphene Ribbon Array and Metal Gratings

The collective oscillation of the massless electrons in graphene ribbons can interact with photons to create graphene plasmon polaritons. The resonance-induced absorption is critical in signal detection and energy harvesting applications. However, because of their atomic thickness, high absorptance is difficult to achieve with graphene ribbons alone. In this work, a hybrid plasmonic system comp...

Direct and quantitative broadband absorptance spectroscopy on small objects using Fourier transform infrared spectrometer and bilayer cantilever probes

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Tunable Fano resonance in hybrid graphene-metal gratings