Room temperature terahertz electro-optic modulation by excitons in carbon nanotubes

T. Ogawa, Shinichi Watanabe, N. Minami, R. Shimano

Research output: Contribution to journalArticle

23 Citations (Scopus)

Abstract

We have investigated the electroabsorption of aligned micelle-wrapped single-walled carbon nanotubes induced by intense terahertz (THz) pulses by using THz-pump and optical-probe spectroscopy at room temperature. The electroabsorption signal is enhanced at exciton resonances near the optical communication wavelength. The signal showed a quadratic dependence on the THz electric field and instantaneously followed the THz oscillation (∼1 ps). The observed ultrafast electro-optic modulation with a THz bandwidth suggests the potential functionality of carbon nanotubes in high-speed electro-optic devices.

Original languageEnglish
Article number041111
JournalApplied Physics Letters
Volume97
Issue number4
DOIs
Publication statusPublished - 2010 Jul 26
Externally publishedYes

Fingerprint

electro-optics
carbon nanotubes
excitons
modulation
room temperature
optical communication
micelles
high speed
pumps
bandwidth
oscillations
electric fields
probes
pulses
wavelengths
spectroscopy

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

Cite this

Room temperature terahertz electro-optic modulation by excitons in carbon nanotubes. / Ogawa, T.; Watanabe, Shinichi; Minami, N.; Shimano, R.

In: Applied Physics Letters, Vol. 97, No. 4, 041111, 26.07.2010.

Research output: Contribution to journalArticle

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