Photon antibunching in single-walled carbon nanotubes at telecommunication wavelengths and room temperature

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We investigated the photoluminescence of individual air-suspended single-walled carbon nanotubes (SWNTs) from 6 to 300 K. Time-resolved and antibunching measurements over the telecommunication wavelength range were performed using a superconducting single-photon detector. We detected moderate temperature independent antibunching behavior over the whole temperature range studied. To investigate the exciton dynamics, which is responsible for the antibunching behavior, we measured excitation-power and temperature dependence of the photoluminescence spectra and lifetime decay curves. These measurements suggested an exciton confinement effect that is likely caused by high-dielectric amorphous carbon surrounding the SWNTs. These results indicate that SWNTs are good candidates for light sources in quantum communication technologies operating in the telecommunication wavelength range and at room temperature.

Original languageEnglish
Article number113106
JournalApplied Physics Letters
Issue number11
Publication statusPublished - 2015 Mar 16


ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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