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Optical excitation of Single-Walled Carbon Nanotubes generates excitons. Exciton decay dynamics are of major importance both for our understanding of the fundamental physics and for all light-based device applications of these 1D quantum systems.
To avoid the major disadvantages of ensemble measurements, namely overlapping contributions from different tube species and averaging over tubes of the same species but with different individual properties (e.g. defect concentration), single nanotube experiments are required.
Setup for time-resolved photoluminescence spectroscopy
Time-dependent photoluminescence intensity for three different
nanotubes showing the decay dynamics of the excited state. The
corresponding lifetimes are derived from fitting with a mono-exponential