  In high magnetic fields, the exciton absorption spectrum of a semiconducting
single-walled carbon nanotube splits as a result of Aharonov-Bohm magnetic
flux. A magnetic field of 370 T, generated by the electro-magnetic flux
compression destructive pulsed magnet-coil technique, was applied to
single-chirality semiconducting carbon nanotubes. Using streak spectroscopy, we
demonstrated the separation of the independent band-edge exciton states at the
K and K' points of the Brillouin zone after the mixing of the dark and bright
states above 150 T. These results enable a quantitative discussion of the whole
picture of the Aharonov-Bohm effect in single-walled carbon nanotubes.
