Experimental proof of localized plasmon resonance was found in thin films containing either single-walled carbon nanotubes (SWNT) or SWNT bundles of different length. All samples were prepared by a simple technique that permitted the selection of different SWNT lengths in different samples without significant differences in electronic properties. Fourier-transform infrared spectroscopy showed that an optical-density peak, the same as a terahertz conductivity peak, shifts to higher frequencies as the SWNT lengths are reduced-in agreement with a similar tendency predicted for the localized plasmon resonance in finite-length SWNTs.
|Journal||Physical Review B - Condensed Matter and Materials Physics|
|State||Published - 18 Apr 2012|