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Peer-reviewedCC BY 4.0ACS Nano

Symmetry-Directed Engineering of Quantum Defects: Toward Monodispersed Organic Color Centers in Carbon Nanotubes

  • Mengyue Wang1,2
  • Jacob Fortner3,4
  • Benjamin Barnes5
  • Daichi Kozawa1,2,6
  • Chee Fai Fong1,2
  • Jeffrey A. Fagan5
  • Yuichiro K. Kato1,2
  • YuHuang Wang3,4,7
7 affiliations
  1. 1Quantum Optoelectronics Research Team, RIKEN Center for Advanced Photonics, Wako, Saitama 351-0198, Japan
  2. 2Nanoscale Quantum Photonics Laboratory, RIKEN Pioneering Research Institute, Wako, Saitama 351-0198, Japan
  3. 3Chemical Physics Program, Institute for Physical Science and Technology, University of Maryland, College Park, Maryland 20742, United States
  4. 4Department of Chemistry and Biochemistry, University of Maryland, College Park, Maryland 20742, United States
  5. 5Materials Science and Engineering Division, National Institute of Standards and Technology, Gaithersburg, Maryland 20899, United States
  6. 6Research Center for Materials Nanoarchitectonics, National Institute for Materials Science, Tsukuba, Ibaraki 305-0044, Japan
  7. 7Maryland NanoCenter, University of Maryland, College Park, Maryland 20742, United States
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Abstract

Achieving spectrally uniform single-photon emission is crucial for scalable quantum photonics, yet conventional approaches often yield broad and unpredictable emission. Here, we report on the selective creation of organic color centers (OCCs) on high-symmetry zigzag (10,0) single-walled carbon nanotubes via a [2 + 2] cycloaddition reaction with 4-cyclopentene-1,3-dione. Density functional theory predicts two possible OCC binding configurations separated by >200 meV, favoring the selective formation of a single OCC geometry. Through chirality sorting, hyperspectral photoluminescence imaging, and multi-step spectral screening, we isolate functionalized (10,0) nanotubes and observe a substantially narrower distribution of OCC emission wavelengths than similarly functionalized chiral nanotubes. Time-resolved photoluminescence and photon correlation measurements further confirm single-photon emission at room temperature. These results demonstrate divalent OCCs on symmetric nanotubes as promising quantum emitters, offering a route toward scalable atomically defined light sources for integrated photonics.

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Cite

BibTeXRIS
BibTeX
@article{wang2026symmetrydirected,
  title = {{Symmetry-Directed Engineering of Quantum Defects: Toward Monodispersed Organic Color Centers in Carbon Nanotubes}},
  author = {Mengyue Wang and Jacob Fortner and Benjamin Barnes and Daichi Kozawa and Chee Fai Fong and Jeffrey A. Fagan and Yuichiro K. Kato and YuHuang Wang},
  journal = {ACS Nano},
  year = {2026},
  month = oct,
  doi = {10.1021/acsnano.6c07965},
  url = {https://doi.org/10.1021/acsnano.6c07965},
  note = {CC BY 4.0},
}
RIS
TY  - JOUR
TI  - Symmetry-Directed Engineering of Quantum Defects: Toward Monodispersed Organic Color Centers in Carbon Nanotubes
AU  - Mengyue Wang
AU  - Jacob Fortner
AU  - Benjamin Barnes
AU  - Daichi Kozawa
AU  - Chee Fai Fong
AU  - Jeffrey A. Fagan
AU  - Yuichiro K. Kato
AU  - YuHuang Wang
PY  - 2026
DA  - 2026/10/15
JO  - ACS Nano
DO  - 10.1021/acsnano.6c07965
UR  - https://doi.org/10.1021/acsnano.6c07965
AB  - Achieving spectrally uniform single-photon emission is crucial for scalable quantum photonics, yet conventional approaches often yield broad and unpredictable emission. Here, we report on the selective creation of organic color centers (OCCs) on high-symmetry zigzag (10,0) single-walled carbon nanotubes via a [2 + 2] cycloaddition reaction with 4-cyclopentene-1,3-dione. Density functional theory predicts two possible OCC binding configurations separated by >200 meV, favoring the selective formation of a single OCC geometry. Through chirality sorting, hyperspectral photoluminescence imaging, and multi-step spectral screening, we isolate functionalized (10,0) nanotubes and observe a substantially narrower distribution of OCC emission wavelengths than similarly functionalized chiral nanotubes. Time-resolved photoluminescence and photon correlation measurements further confirm single-photon emission at room temperature. These results demonstrate divalent OCCs on symmetric nanotubes as promising quantum emitters, offering a route toward scalable atomically defined light sources for integrated photonics.
SN  - 1936-0851
SN  - 1936-086X
ER  -