The optical resonances in carbon nanotubes arise from excitons

Science

Volumn 308, Issue 5723, 2005, Pages 838-841

  Wang, Feng ^a   Dukovic, Gordana ^a   Brus, Louis E ^a   Heinz, Tony F ^a  

^a Och Spine at New York Presbyterian Hospitals   (United States)

Author keywords

[No Author keywords available]

Indexed keywords

BINDING ENERGY; CHEMICAL BONDS; EXCITONS; LIGHT ABSORPTION; PHOTONS; RESONANCE; SPECTROSCOPIC ANALYSIS;

EXCITATION SPECTROSCOPY; OPTICAL RESONANCES; OPTICAL TRANSITION; VAN HOVE SINGULARITIES;

CARBON NANOTUBES;

CARBON NANOTUBE; EXCITON; UNCLASSIFIED DRUG;

CHEMISTRY; PHYSICS;

ARTICLE; ATOMIC PARTICLE; LIGHT ABSORPTION; MOLECULAR INTERACTION; PHOTON; PRIORITY JOURNAL; SEMICONDUCTOR;

EID: 18244392180     PISSN: 00368075     EISSN: None     Source Type: Journal    
DOI: 10.1126/science.1110265     Document Type: Article

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30. To eliminate the influence of background in determining the two-photon excitation spectrum of SWNTs of a given chiral index, we plotted the experimental emission spectra, corresponding to vertical cuts in the two-dimension contour plot of Fig. 2, for a series of two-photon excitation energies. We then fit each emission spectrum to a sum of Lorentzian features corresponding to the relevant nanotube species in our ensemble sample. The two-photon excitation spectrum for a given nanotube chiral index was then obtained by tracking the peak height of corresponding fluorescence contribution as a function of the two-photon excitation energy.
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33. We would like to thank Ph. Avouris, M. Hybertsen, M. Loy, P. Kim, V. Perebeinos, and M. Sfeir for helpful discussions. Supported by the Nanoscale Science and Engineering Initiative of the NSF (grant no. CHE-0117752), by the New York State Office of Science, Technology, and Academic Research, and by the U.S. Department of Energy Office of Basic Energy Sciences (grant nos. DOE-FG02-98ER14861 and DE-FG02-03ER15463).