Biexciton, single carrier, and trion generation dynamics in single-walled carbon nanotubes

B. Yuma, S. Berciaud, J. Besbas, J. Shaver, S. Santos, S. Ghosh, R. B. Weisman, L. Cognet, M. Gallart, M. Ziegler, B. Hönerlage, B. Lounis, P. Gilliot

Research output: Contribution to journalArticlepeer-review

67 Scopus citations

Abstract

We present a study of free carrier photogeneration and multicarrier bound states, such as biexcitons and trions (charged excitons), in semiconducting single-walled carbon nanotubes. Pump-and-probe measurements performed with fs pulses reveal the effects of strong Coulomb interactions between carriers on their dynamics. Biexciton formation by optical transition from exciton population results in an induced absorption line (binding energy 130 meV). Exciton-exciton annihilation process is shown to evolve at high densities towards an Auger process that can expel carriers from nanotubes. The remaining carriers give rise to an induced absorption due to trion formation (binding energy 190 meV). These features show the dynamics of exciton and free carriers populations.

Original languageEnglish (US)
Article number205412
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume87
Issue number20
DOIs
StatePublished - May 8 2013

Fingerprint Dive into the research topics of 'Biexciton, single carrier, and trion generation dynamics in single-walled carbon nanotubes'. Together they form a unique fingerprint.

Cite this