Tunable Resonant Raman Scattering from Singly Resonant Single Wall Carbon Nanotubes

TL;DR

This study investigates tunable resonant Raman scattering in single wall carbon nanotubes, revealing insights into their electronic structure, phonon energies, and spatial distribution, along with identifying a nanoscale artifact called the 'nano-slit effect.'

Contribution

It provides detailed measurements of Raman scattering in various nanotubes and introduces the 'nano-slit effect' as a new spectral artifact to consider.

Findings

Measured scattering cross-sections as a function of laser energy.

Constructed two-dimensional spatial maps of nanotubes.

Identified and described the 'nano-slit effect' artifact.

Abstract

We perform tunable resonant Raman scattering on 17 semiconducting and 7 metallic singly resonant single wall carbon nanotubes. The measured scattering cross-section as a function laser energy provides information about a tube's electronic structure, the lifetime of intermediate states involved in the scattering process and also energies of zone center optical phonons. Recording the scattered Raman signal as a function of tube location in the microscope focal plane allows us to construct two-dimensional spatial maps of singly resonant tubes. We also describe a spectral nanoscale artifact we have coined the "nano-slit effect".