Radiative collective modes in ion-implanted multiwalled carbon nanotubes

Surface mode fields are strongly confined to a MWCNT surface, representing a conceivable solution for realization of quasi-2D optics. In the present Contribution, MWCNTs are ion implanted with guest ions. Implantation enables engineering of the local dielectric tensor (k,ω), allowing specific selection of the γ emission eigenfrequency. C_s-corrected STEM is used to acquire EEL spectra with atomic resolution. Lines are subsequently characterized using EEL spectra simulated using first-principles DFT calculations, utilising the full-potential linearised augmented plane wave formalism. In addition to presenting virtual collective modes, implanted guest ions are seen to introduce waveguide eigensolutions which provide a possible mechanism for light transmission in MWCNTs.