Abstract
Magneto-absorption spectra of SWNTs (Single-Walled Carbon Nanotubes) in the region of near infrared were measured under high magnetic fields up to 54 T. We succeeded to observe clear peak shifts and splittings for four different chiralities of SWNTs, (7,5), (7,6), (8,6), and (8,7). We employed PFO (poly(9,9-dioctylfluorenyl-2,7-diyl))-SWNTs. Absorption peaks are very sharp and we could observe well-defined peaks of each chirality with less mixture of the other peaks of different chirality. Energy positions of band-edge bright and dark excitons were determined distinctly in each chirality.
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