Journal
APPLIED PHYSICS LETTERS
Volume 97, Issue 4, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.3470105
Keywords
carbon nanotubes; electroabsorption; electro-optical modulation; excitons; high-speed optical techniques; terahertz waves
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Funding
- MEXT, Japan [18340082, 20110005]
- Grants-in-Aid for Scientific Research [18340082, 20110005] Funding Source: KAKEN
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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 (similar to 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. (C) 2010 American Institute of Physics. [doi: 10.1063/1.3470105]
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