Abstract
We report experimental measurements of electronic Raman scattering by electrons (holes) in individual single-walled carbon nanotubes (SWNTs) under resonant conditions. The Raman scattering at low frequency range reveals a single particle excitation feature. And the dispersion of electronic structure around the center of Brillouin zone of a semiconducting SWNT (14, 13) is extracted.
Highlights
We report experimental measurements of electronic Raman scattering by electrons in individual single-walled carbon nanotubes (SWNTs) under resonant conditions
The other electronic Raman scattering (ERS) modes well established in conventional semiconductors, for example, the ones arising from single particle and collective elementary excitations which carry information on the electronic band dispersions, have not been observed yet
It is technically challenging to distinguish such a low frequency Raman signal from Rayleigh scattering; (iii) Resonance Raman scatterings from individual SWNTs in most experimental setups are conducted with a confocal-like micro-Raman setup in order to maximize the light collecting power, where the incident light and scattered light are both at normal direction with respect to the SWNT axis
Summary
Electronic Raman Scattering On Individual Semiconducting Single Walled Carbon Nanotubes. We report experimental measurements of electronic Raman scattering by electrons (holes) in individual single-walled carbon nanotubes (SWNTs) under resonant conditions. The Raman scattering at low frequency range reveals a single particle excitation feature. It is technically challenging to distinguish such a low frequency Raman signal from Rayleigh scattering; (iii) Resonance Raman scatterings from individual SWNTs in most experimental setups are conducted with a confocal-like micro-Raman setup in order to maximize the light collecting power, where the incident light and scattered light are both at normal direction with respect to the SWNT axis. We study the low frequency Raman spectra on SWNTs under the resonant excitation at oblique incident angles.
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