Exciton binding energies in carbon nanotubes from two-photon photoluminescence

Details Exciton binding energies in carbon nanotubes from two-photon photoluminescence Exciton binding energies in carbon nanotubes from two-photon photoluminescence

2005-05-06

arxiv.org/abs/cond-mat/0505150v1

Phys. Rev. B 72, 241402(R) (2005)

Physics

Condensed Matter

Materials Science

5 pages, 4 figures

Scientific paper

10.1103/PhysRevB.72.241402

One- and two-photon luminescence excitation spectroscopy showed a series of distinct excitonic states in single-walled carbon nanotubes. The energy splitting between one- and two-photon-active exciton states of different wavefunction symmetry is the fingerprint of excitonic interactions in carbon nanotubes. We determine exciton binding energies of 0.3-0.4 eV for different nanotubes with diameters between 0.7 and 0.9 nm. Our results, which are supported by ab-initio calculations of the linear and non-linear optical spectra, prove that the elementary optical excitations of carbon nanotubes are strongly Coulomb-correlated, quasi-one dimensionally confined electron-hole pairs, stable even at room temperature. This alters our microscopic understanding of both the electronic structure and the Coulomb interactions in carbon nanotubes, and has direct impact on the optical and transport properties of novel nanotube devices.

Affiliated with

Also associated with

No associations

Rating

Exciton binding energies in carbon nanotubes from two-photon photoluminescence does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Exciton binding energies in carbon nanotubes from two-photon photoluminescence, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Exciton binding energies in carbon nanotubes from two-photon photoluminescence will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-693340