Gigantic optical Stark effect and ultrafast relaxation of excitons in single-walled carbon nanotubes

Atsushi Maeda, Shinji Matsumoto, Hideo Kishida, Taishi Takenobu, Yoshihiro Iwasa, Hideo Shimoda, Otto Zhou, Masashi Shiraishi, Hiroshi Okamoto

Research output: Contribution to journalArticle

16 Citations (Scopus)

Abstract

We report a splitting and a shift of exciton absorptions in semiconducting single-walled carbon nanotubes (SWNTs) by resonant and off-resonant excitation using a fs laser pulse, respectively. This is the first unambiguous observation of the optical Stark effect of excitons in SWNTs, which is responsible for their high optical-switching performance. By scrutinizing transient absorption spectra from the mid-to near-infrared region (0.1- 0.8 eV), the ultrafast recovery of real carrier excitations characteristic of bundled structures was attributed to the energy- and charge-transfer processes to metallic SWNTs.

Original languageEnglish
Article number043709
JournalJournal of the Physical Society of Japan
Volume75
Issue number4
DOIs
Publication statusPublished - 2006 Apr
Externally publishedYes

Keywords

  • Carbon nanotube
  • Exciton
  • Nonlinear optical response
  • Optical Stark effect
  • Pump-probe spectroscopy

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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