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Title: Tunable room-temperature single-photon emission at telecom wavelengths from sp 3 defects in carbon nanotubes

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 sp 3 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. Furthermore, 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).
ORCiD logo [1] ; ORCiD logo [1] ;  [1] ;  [1] ; ORCiD logo [2] ; ORCiD logo [2] ;  [3] ;  [3] ;  [4] ; ORCiD logo [5] ;  [5] ;  [5] ;  [1] ;  [1]
  1. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
  2. National Renewable Energy Lab. (NREL), Golden, CO (United States)
  3. Rice Univ., Houston, TX (United States)
  4. Tokyo Metropolitan Univ., Tokyo (Japan)
  5. National Institute of Advanced Industrial Science and Technology (AIST), Ibaraki (Japan)
Publication Date:
Report Number(s):
NREL/JA-5900-68252; LA-UR-17-21420
Journal ID: ISSN 1749-4885
Grant/Contract Number:
AC36-08GO28308; AC52-06NA25396
Accepted Manuscript
Journal Name:
Nature Photonics
Additional Journal Information:
Journal Volume: 11; Journal Issue: 9; Journal ID: ISSN 1749-4885
Nature Publishing Group
Research Org:
National Renewable Energy Lab. (NREL), Golden, CO (United States); Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Sponsoring Org:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22); USDOE Laboratory Directed Research and Development (LDRD) Program
Country of Publication:
United States
36 MATERIALS SCIENCE; 77 NANOSCIENCE AND NANOTECHNOLOGY; carbon nanotubes; emissions; quantum computing; single-photon; telecommunications; Material Science
OSTI Identifier:
Alternate Identifier(s):
OSTI ID: 1406208