Optoelectronic modulation by multi-wall carbon nanotubes

C. Torres-Torres, Nestor Perea Lopez, H. Martínez-Gutiérrez, M. Trejo-Valdez, J. Ortíz-López, Mauricio Terrones Maldonado

Research output: Contribution to journalArticlepeer-review

15 Scopus citations


We report the observation of photoconduction and a strong nonlinear optical absorptive response exhibited by multi-wall carbon nanotubes. An aerosol pyrolysis method was employed for the preparation of the samples. Measurements of the optical transmittance with 7 ns pulses at 1064 nm wavelength allowed us to identify a two-photon absorption effect as the main mechanism of third-order nonlinearity. Photoconductive experiments at 445 nm wavelength seem to confirm the possibility for generating non-resonant multi-photonic absorption processes in the multi-wall carbon nanotubes. By the optical control of the conductivity in the nanotubes, we implement an optoelectronic amplitude modulator device with potential applications for sharp selective functionalities.

Original languageEnglish (US)
Article number045201
Issue number4
StatePublished - Feb 1 2013

All Science Journal Classification (ASJC) codes

  • Bioengineering
  • Chemistry(all)
  • Electrical and Electronic Engineering
  • Mechanical Engineering
  • Mechanics of Materials
  • Materials Science(all)


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