1. Visible emission of single-wall carbon nanotubes formed in micro-channels of zeolite crystals
- Author
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Nagasawa, N., Sugiyama, H., Naka, N., Kudryashov, I., Watanabe, M., Hayashi, T., Božović, I., Božović, N., Li, G., Li, Z., and Tang, Z.K.
- Subjects
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NANOTUBES , *ZEOLITES , *EMISSION spectroscopy , *OPTICAL polarization , *OPTICAL materials - Abstract
Emission spectroscopy is performed to study the optical transitions between electronic bands of SWCNs formed in
AlPO4−5 (AFI) crystal. Strong visible emission is observed under laser light illumination at room temperature. The emission is excited by the light polarized along thec -axis and its polarization is also along this direction. On the other hand, non-linear emission is observed under the resonant excitation of the lowest absorption band of SWCNs. The emission is excited by the light polarized along thec -axis, but it shows the polarization perpendicular to thec -axis. The polarization character is discussed on the basis of the selection rules of the optical transitions predicted by the full line-group symmetry of SWCNs. [Copyright &y& Elsevier]- Published
- 2002
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