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Measurement of the optical Stark effect in semiconducting carbon nanotubes |
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| Authors: | Daohua Song Feng Wang Gordana Dukovic Ming Zheng E. D. Semke Louis E. Brus Tony F. Heinz |
| Affiliation: | (1) Departments of Physics and Electrical Engineering, Columbia University, New York, NY 10027, USA;(2) Department of Chemistry, Columbia University, New York, NY 10027, USA;(3) DuPont Central Research and Development, Wilmington, DE 19880, USA;(4) Present address: University of California at Berkeley, Berkeley, CA 94720, USA |
| Abstract: | A strong optical Stark effect has been observed in (6,5) semiconducting single-walled carbon nanotubes by femtosecond pump-probe spectroscopy. The response is characterized by an instantaneous blueshift of the excitonic resonance upon application of pump radiation at photon energy well below the band gap. The large Stark effect is attributed to the enhanced Coulomb interactions present in these one-dimensional materials. |
| Keywords: | KeywordHeading" >PACS 42.50.Hz 71.35.-y 78.67.Ch |
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