期刊
NATURE PHOTONICS
卷 11, 期 9, 页码 577-+出版社
NATURE PUBLISHING GROUP
DOI: 10.1038/NPHOTON.2017.119
关键词
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资金
- Los Alamos National Laboratory Directed Research and Development funds
- Japan Society for the Promotion of Science (JSPS) KAKENHI [JP16H07103, JP25220602]
- Solar Photochemistry Program of the US Department of Energy, Office of Science, Basic Energy Sciences, Division of Chemical Sciences, Geosciences and Biosciences [DE-AC36-08GO28308]
- Robert A. Welch Foundation [C-1509]
- Grants-in-Aid for Scientific Research [17K14088] Funding Source: KAKEN
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 mu m) is achieved at the largest nanotube diameters we explore (0.936 nm).
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