Luminescence Decay and the Absorption Cross-Section of Individual Single-Walled Carbon Nanotubes

Abstract

The absorption cross section of highly luminescent individual single-walled carbon nanotubes is determined using time-resolved and cw luminescence spectroscopy. A mean value of 1x10-17 cm2 per carbon atom is obtained for (6,5) tubes excited at their second optical transition, and corroborated by single tube photothermal absorption measurements. Biexponential luminescence decays are systematically observed, with short and long lifetimes around 45 and 250 ps. This behavior is attributed to the band edge exciton fine structure with a dark level lying a few meV below a bright one.

References in corpus (6)

• Exciton binding energies in carbon nanotubes from two-photon photoluminescence
• Stepwise Quenching of Exciton Fluorescence in Carbon Nanotubes by Single Molecule Reactions
• Photothermal heterodyne imaging of individual nonfluorescent nanoclusters and nanocrystals
• Electron-electron interaction effects on optical excitations in semiconducting single-walled carbon nanotubes
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Cited by in corpus (7)

• Defect Induced Photoluminescence from Dark Excitonic States in Individual Single-Walled Carbon Nanotubes
• Luminescence Properties of Individual Empty and Water-filled Single-Walled Carbon Nanotubes
• Ultrafast terahertz probes of interacting dark excitons in chirality-specific semiconducting single-walled carbon nanotubes
• Influences of Exciton Diffusion and Exciton-Exciton Annihilation on Photon Emission Statistics of Carbon Nanotubes
• In situ Characterization of Nanoparticles Using Rayleigh Scattering
• Quantum emission assisted by energy landscape modification in pentacene-decorated carbon nanotubes
• Diffusive and Unimolecular Nonradiative Decay of Excited States in Doped Carbon Nanotubes