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

*この研究の対応する著者

研究成果: Article査読

4 被引用数 (Scopus)

抄録

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.

本文言語English
ジャーナルJapanese Journal of Applied Physics, Part 2: Letters
45
20-23
DOI
出版ステータスPublished - 2006 5月 19
外部発表はい

ASJC Scopus subject areas

  • 物理学および天文学(その他)

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