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

T. Ogawa; S. Watanabe; N. Minami; R. Shimano

doi:10.1063/1.3470105

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

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

Research output: Contribution to journal › Article › peer-review

25 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 language	English
Article number	041111
Journal	Applied Physics Letters
Volume	97
Issue number	4
DOIs	https://doi.org/10.1063/1.3470105
Publication status	Published - 2010 Jul 26
Externally published	Yes

ASJC Scopus subject areas

Physics and Astronomy (miscellaneous)

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10.1063/1.3470105

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title = "Room temperature terahertz electro-optic modulation by excitons in carbon nanotubes",

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.",

author = "T. Ogawa and S. Watanabe and N. Minami and R. Shimano",

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T1 - Room temperature terahertz electro-optic modulation by excitons in carbon nanotubes

AU - Ogawa, T.

AU - Watanabe, S.

AU - Minami, N.

AU - Shimano, R.

N1 - Funding Information: This work was partly supported by Grants-in-Aid for Scientific Research (Grant Nos. 18340082 and 20110005) from the MEXT, Japan.

PY - 2010/7/26

Y1 - 2010/7/26

N2 - 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.

AB - 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.

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

Abstract

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