Coherent plasmon and phonon-plasmon resonances in carbon nanotubes

TL;DR

This paper demonstrates that aligned carbon nanotubes support high-quality coherent plasmon resonances that hybridize with phonons, offering promising applications in infrared spectroscopy and nanoscale optical devices.

Contribution

It reveals the existence of coherent plasmon and phonon-plasmon resonances in aligned carbon nanotubes with high quality factors, advancing nanotube plasmonics.

Findings

Support for coherent plasmon resonances in nanotube arrays

Hybridization of plasmons with phonons observed

High quality factors up to 10 achieved

Abstract

Carbon nanotubes provide a rare access point into the plasmon physics of one-dimensional electronic systems. By assembling purified nanotubes into uniformly sized arrays, we show that they support coherent plasmon resonances, that these plasmons enhance and hybridize with phonons, and that the phonon-plasmon resonances have quality factors as high as 10. Because coherent nanotube plasmonics can strengthen light-matter interactions, it provides a compelling platform for surface-enhanced infrared spectroscopy and tunable, high-performance optical devices at the nanometer scale.