Abstract
This paper reports on a photophysics study of gate-doped single-wall carbon nanotubes suspended over trenches. The authors experimentally demonstrate trion emissions from electrostatically doped nanotubes. They observe that the trion binding energies can be manipulated by varying the nanotube diameter.
Highlights
The quasi-one-dimensional geometry of single-walled carbon nanotubes (SWCNTs) results in enhanced Coulombic effects that are sensitive to environmental dielectric screening
When a gate voltage is applied, a peak emerges at an energy below the E11 bright exciton emission
Excitation spectroscopy under the application of the gate voltage shows that the absorption resonances for both emission peaks are the same, indicating that they arise from the same nanotube
Summary
The quasi-one-dimensional geometry of single-walled carbon nanotubes (SWCNTs) results in enhanced Coulombic effects that are sensitive to environmental dielectric screening. We report on gate-voltage induced trions in suspended carbon nanotubes within field-effect transistor structures. When a gate voltage is applied, a peak emerges at an energy below the E11 bright exciton emission.
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