Yoshiaki Nagasawa

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We have performed electroabsorption spectroscopy on micelle-wrapped single-wall carbon nanotubes. In semiconducting nanotubes, many oscillating structures composed of the increase and decrease of absorption are observed in the spectra in the region of the first and second absorption bands, E11 and E22. The spectral shape is reproduced mainly by the(More)
We present three pulse stimulated photon echo peak shift measurements on several polar protic and aprotic solvents using 22 and 90 fs pulses. Measurements with both pulse durations reveal distinct ultrafast «lOOfs) incipient relaxations followed by identical decays after about 300 fs. Photon echo measurements have demonstrated their ability to measure the(More)
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