Tunable Room-Temperature Single-Photon Emission at Telecom Wavelengths from sp3 Defects in Carbon Nanotubes

Jeffrey Blackburn, Rachelle Ihly, Xiaowei He, Nicolai Hartmann, Xuedan Ma, Weilu Gao, Junichiro Kono, Yohei Yomogida, Atsushi Hirano, Takeshi Tanaka, Hiromichi Kataura, Han Htoon, Stephen Doorn, Younghee Kim

Research output: Contribution to journalArticlepeer-review

233 Scopus Citations


Generating quantum light emitters that operate at room temperature and at telecom wavelengths remains a significant materials challenge. To achieve this goal requires light sources that emit in the near-infrared wavelength region and that, ideally, are tunable to allow desired output wavelengths to be accessed in a controllable manner. Here, we show that exciton localization at covalently introduced aryl sp3 defect sites in single-walled carbon nanotubes provides a route to room-temperature single-photon emission with ultrahigh single-photon purity (99%) and enhanced emission stability approaching the shot-noise limit. Moreover, we demonstrate that the inherent optical tunability of single-walled carbon nanotubes, present in their structural diversity, allows us to generate room-temperature single-photon emission spanning the entire telecom band. Single-photon emission deep into the centre of the telecom C band (1.55 um) is achieved at the largest nanotube diameters we explore (0.936 nm).
Original languageAmerican English
Pages (from-to)577-582
Number of pages6
JournalNature Photonics
Issue number9
StatePublished - 2017

NREL Publication Number

  • NREL/JA-5900-68252


  • carbon nanotubes
  • emissions
  • quantum computing
  • single-photon
  • solar-photochemistry
  • telecommunications


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