Journal Article


Werner J. Blau
Takeyuki Kobayashi
Bernd Lahr
Anna Drury
Jonathan N Coleman
Margaret E Brennan



multiwalled carbon nanotubes absorption optical spectroscopy energy processes photoluminescence density nonlinear

Nonlinear photoluminescence from van Hove singularities in multiwalled carbon nanotubes. (2003)

Abstract Van Hove singularities (VHS) in the density of states of multiwalled carbon nanotubes (MWNTs) have been observed by optical spectroscopy for the first time to the authors' knowledge. Additionally, unexpected visible luminescence has been observed on photoexcitation at 1064 nm. This luminescence is believed to arise from radiative transitions between energy states in the VHS. A mechanism describing the underlying processes, which involve multiphoton absorption followed by upconverted luminescence from VHS energy states, is presented. Our results show that the presence of VHS readily facilitates efficient optical transitions in
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Full list of authors on original publication

Werner J. Blau, Takeyuki Kobayashi, Bernd Lahr, Anna Drury, Jonathan N Coleman, Margaret E Brennan

Experts in our system

Werner Blau
Trinity College Dublin
Total Publications: 109
Jonathan Coleman
Trinity College Dublin
Total Publications: 217