Journal
ACS NANO
Volume 12, Issue 5, Pages 4295-4303Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsnano.7b08810
Keywords
nanocrystals; single-photon sources; quantum emitters; single-molecule spectroscopy; organic molecules
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Funding
- COST Action [MP1403]
- Fondazione Cassa di Risparmio di Firenze (GRANCASSA)
- MIUR program Q-Sec Ground Space Communications
- EraNET Cofund Initiatives QuantERA under the European Union's Horizon 2020 Research and Innovation Programme [731473]
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Quantum technologies could largely benefit from the control of quantum emitters in sub-micrometric size crystals. These are naturally prone to integration in hybrid devices, including heterostructures and complex photonic devices. Currently available quantum emitters in nanocrystals suffer from spectral instability, preventing their use as single-photon sources for most quantum optics operations. In this work we report on the performances of single-photon emission from organic nanocrystals (average size of hundreds of nm), made of anthracene (Ac) and doped with dibenzoterrylene (DBT) molecules. The source has hours-long photostability with respect to frequency and intensity, both at room and at cryogenic temperature. When cooled to 3 K, the 00-zero phonon line shows linewidth values (50 MHz) close to the lifetime limit. Such optical properties in a nanocrystalline environment recommend the proposed organic nanocrystals as single-photon sources for integrated photonic quantum technologies.
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