Ultrafast pump–probe measurements in single wall carbon nanotubes

We present a time-resolved experimental study of carrier dynamics in single wall carbon nanotubes (SWCNTs). This study is performed by means of pump–probe experiments in either a degenerate or a two-color configuration with a resonant excitation of semi-conductor SWCNTs. Both pump and probe are in resonance with the interband transitions of the semiconductor nanotubes (at 0.8 and View the MathML source). We observe photobleaching with a typical recovery time of View the MathML source. This non-linear response is governed by the carrier recombination at the band edge of semiconductor nanotubes.