Optical stark effect of exciton in semiconducting single-walled carbon nanotubes

Shinji Matsumoto, Hiroyuki Matsui, Atsushi Maeda, Taishi Takenobu, Yoshihiro Iwasa, Yasumitsu Miyata, Hiromichi Kataura, Yutaka Maniwa, Hiroshi Okamoto

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)

Abstract

An instantaneous blue shift of exciton absorption due to the optical Stark effect was observed in isolated semiconducting single-walled carbon nanotubes (SWNTs) by using a femtosecond (fs) pump-probe spectroscopy. From the analysis of time profiles of transient absorption changes, the photoinduced shift and the dipole moment of the exciton transition were evaluated as ∼1.1 meV for the pump fluence of 34 μJ/cm2 and ∼6 eÅ, respectively. Such a large dipole moment as well as ultrafast recovery of real carrier excitations suggests high potential of SWNTs for an ultrafast optical-switching material.

Original languageEnglish
JournalJapanese Journal of Applied Physics, Part 2: Letters
Volume45
Issue number20-23
DOIs
Publication statusPublished - 2006 May 19
Externally publishedYes

Keywords

  • Carbon nanotube
  • Exciton
  • Femtosecond spectroscopy
  • Nonlinear optical response
  • Optical Stark effect

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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