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Updated: Jul 9, 2026

Resonance Raman Spectroscopy of Extreme Nanowires and Other 1D Systems
Published on: April 28, 2016
Exciton dissociation and stark effect in the carbon nanotube photocurrent spectrum
Aditya D Mohite1, Prasanth Gopinath, Hemant M Shah
1Department of Electrical and Computer Engineering, University of Louisville, Louisville, Kentucky 40292, USA.
Abstract:
The field-dependent photocurrent spectrum of individual carbon nanotubes is measured using a displacement photocurrent technique. A series of peaks is observed in the photocurrent corresponding to both excitonic and free carrier transitions. The photocurrent peak corresponding to the ground state exciton increases by a factor of 200 beyond a critical electric field, and shows both red and blue shifts depending on the field regime. This provides evidence for field-induced mixing between excitonic and free carrier states.
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