Photoluminescence clamping with few excitons in a single-walled carbon nanotube

Abstract

Single air-suspended carbon nanotubes (length 2 - 5 microns) exhibit high optical quantum efficiency (7 - 20%) for resonant pumping at low intensities. Under ultrafast excitation, the photoluminescence dramatically saturates for very low injected exciton numbers (2 to 6 excitons per pulse per SWCNT). This PL clamping is attributed to highly efficient exciton-exciton annihilation over micron length scales. Stochastic modeling of exciton dynamics and femtosecond excitation correlation spectroscopy allow determination of nanotube absorption (2 - 6%) and exciton lifetime (85 +- 20 ps).

4 pages, 3 figures

References in corpus (5)

• Measurement of the Optical Conductivity of Graphene
• Stepwise Quenching of Exciton Fluorescence in Carbon Nanotubes by Single Molecule Reactions
• Photon Antibunching in the Photoluminescence Spectra of a Single Carbon Nanotube
• Luminescence Decay and the Absorption Cross-Section of Individual Single-Walled Carbon Nanotubes
• Nonlinear Photoluminescence Excitation Spectroscopy of Carbon Nanotubes: Exploring the Upper Density Limit of One-Dimensional Excitons

Cited by in corpus (17)

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• Spontaneous exciton dissociation in carbon nanotubes
• Gate-induced blueshift and quenching of photoluminescence in suspended single-walled carbon nanotubes
• Room-temperature single photon emission from micron-long air-suspended carbon nanotubes
• Influences of Exciton Diffusion and Exciton-Exciton Annihilation on Photon Emission Statistics of Carbon Nanotubes
• Giant circular dichroism in individual carbon nanotubes induced by extrinsic chirality
• High energetic excitons in carbon nanotubes directly probe charge-carriers
• High efficiency dark-to-bright exciton conversion in carbon nanotubes
• Stark effect of excitons in individual air-suspended carbon nanotubes
• Gate-controlled generation of optical pulse trains using individual carbon nanotubes
• Nonlinear Photoluminescence Properties of Trions in Hole-doped Single-walled Carbon Nanotubes
• Measurement of optical second-harmonic generation from an individual single-walled carbon nanotube
• Super-Resolution Fluorescence Imaging of Carbon Nanotubes Using a Nonlinear Excitonic Process
• First-passage theory of exciton population loss in single-walled carbon nanotubes reveals micron-scale intrinsic diffusion lengths
• Independence of Optical Absorption on Auger Ionization in Single-Walled Carbon Nanotubes Revealed by Ultrafast e-h Photodoping