86 citations · 188 across the 7 of their papers we have counts for
7 papers
Scaling of exciton binding energy with external dielectric function in carbon nanotubes
Andrew G. Walsh, A. Nickolas Vamivakas, Yan Yin +4
We develop a scaling relationship between the exciton binding energy and the external dielectric function in carbon nanotubes. We show that the electron-electron and electron-hole…
Screening of Excitons in Single, Suspended Carbon Nanotubes
Andrew G. Walsh, A. Nickolas Vamivakas, Yan Yin +4
Resonant Raman spectroscopy of single carbon nanotubes suspended across trenches displays red shifts of up to 30 meV of the electronic transition energies as a function of the surr…
Chirality dependence of the radial breathing phonon mode density in single wall carbon nanotubes
A. N. Vamivakas, Y. Yin, A. G. Walsh +3
A mass and spring model is used to calculate the phonon mode dispersion for single wall carbon nanotubes (SWNTs) of arbitrary chirality. The calculated dispersions are used to dete…
Optical Determination of Electron-Phonon Coupling in Carbon Nanotubes
Y. Yin, A. Vamivakas, A. Walsh +4
We report on an optical method to directly measure electron-phonon coupling in carbon nanotubes by correlating the first and second harmonic of the resonant Raman excitation profil…
Tunable Resonant Raman Scattering from Singly Resonant Single Wall Carbon Nanotubes
Y. Yin, A. G. Walsh, A. N. Vamivakas +7
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 l…
Exciton mediated one phonon resonant Raman scattering from one-dimensional systems
A. N. Vamivakas, A. Walsh, Y. Yin +3
We use the Kramers-Heisenberg approach to derive a general expression for the resonant Raman scattering cross section from a one-dimensional (1D) system explicitly accounting for e…