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Optics Letters

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  • Vol. 28, Iss. 4 — Feb. 15, 2003
  • pp: 266–268

Nonlinear photoluminescence from van Hove singularities in multiwalled carbon nanotubes

Margaret E. Brennan, Jonathan N. Coleman, Anna Drury, Bernd Lahr, Takeyuki Kobayashi, and Werner J. Blau  »View Author Affiliations


Optics Letters, Vol. 28, Issue 4, pp. 266-268 (2003)
http://dx.doi.org/10.1364/OL.28.000266


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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 MWNTs.

© 2003 Optical Society of America

OCIS Codes
(190.4710) Nonlinear optics : Optical nonlinearities in organic materials
(190.7220) Nonlinear optics : Upconversion
(270.4180) Quantum optics : Multiphoton processes
(300.1030) Spectroscopy : Absorption
(300.6410) Spectroscopy : Spectroscopy, multiphoton

Citation
Margaret E. Brennan, Jonathan N. Coleman, Anna Drury, Bernd Lahr, Takeyuki Kobayashi, and Werner J. Blau, "Nonlinear photoluminescence from van Hove singularities in multiwalled carbon nanotubes," Opt. Lett. 28, 266-268 (2003)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-28-4-266


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References

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