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Updated: Jul 17, 2026

Resonance Raman Spectroscopy of Extreme Nanowires and Other 1D Systems
Published on: April 28, 2016
Exciton ionization, Franz-Keldysh, and Stark effects in carbon nanotubes
Vasili Perebeinos1, Phaedon Avouris
1IBM Research Division, T. J. Watson Research Center, Yorktown Heights, New York 10598, USA. vperebe@us.ibm.com
Abstract:
We calculate the optical properties of carbon nanotubes in an external static electric field directed along the tube axis. We predict strong Franz-Keldysh oscillations in the first and second band-to-band absorption peaks, quadratic Stark effect of the first two excitons, and the field dependence of the bound exciton ionization rate for a wide range of tube chiralities. We find that the phonon-assisted mechanism dominates the dissociation rate in electro-optical devices due to the hot optical phonons. We predict a quadratic dependence of the Sommerfeld factor on the electric field and its increase up to 2000% at the critical field of the full exciton dissociation.
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