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Fig. 3 | Nano Convergence

Fig. 3

From: Plasmonic sensors based on graphene and graphene hybrid materials

Fig. 3

Tuning graphene plasmons by modulating widths of graphene ribbons (a) and introducing out-of-plane deformations (b). a Extinction spectra of bilayer graphene ribbon. The plasmon-phonon coupling is shown by the spectral dip near 1580 cm− 1 which depends on the ribbon width. Reprinted with permission from [46]. Copyright 2014 American Chemical Society. b Optical absorption spectra of a crumpled graphene structure for a corrugation pitch (\({\lambda }_{c}\)) of 250 nm and aspect ratio (\(h/{\lambda }_{c}\), \(h\) refers to the height of the corrugation) of 1 (left). \(\overrightarrow{{E}_{ext}}\) denotes the E-field direction of the excitation. Different plasmon resonance modes are shown in the inset. Right panel shows the plasmon resonance wavelength (\({\lambda }_{res}\)) dependence on the \({\lambda }_{c}\) and aspect ratio. The solid curves represent \({\lambda }_{res}\) calculated from the LC-circuit model and dashed curve represent \({\lambda }_{res}\) estimated from the conventional analytical model. Reprinted under the terms of the Creative Commons License from [49]. Copyright 2018 The Authors. Published by Springer Nature

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