Scientific Results

Self-Assembled Nanocrystals of Polycyclic Aromatic Hydrocarbons Show Photostable Single-Photon Emission

Year: 2018

Authors: Pazzagli S., Lombardi P., Martella D., Colautti A., Tiribilli B., Cataliotti FS., Toninelli C.

Autors Affiliation: Dipartimento di Fisica Ed Astronomia, Università di Firenze, Via Sansone 1, Sesto, Firenze, I-50019, Italy; CNR-INO, Istituto Nazionale di Ottica, Via Carrara 1, Sesto, Firenze, 50019, Italy; LENS and Università di Firenze, Via Carrara 1, Sesto, Firenze, 50019, Italy; CNR-ISC Istituto Dei Sistemi Complessi, Via Madonna del Piano 10, Sesto, Firenze, I-50019, Italy; QSTAR, Largo Fermi 2, Firenze, I-50125, Italy

Abstract: 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.

Journal/Review: ACS NANO

Volume: 12 (5)      Pages from: 4295  to: 4303

More Information: The authors would like to thank S. Ciattini and L. Chelazzi (CRIST) for helping with XRD measurements, M. Mamusa for dynamic light scattering experiments, F. Intonti for the microinfiltration setup, D. S. Wiersma for access to clean room facilities, M. Bellini and C. Corsi for Ti:sapphire operation, and K. G. Schad¨ ler and F. H. L. Koppens for helpful feedback on the NCs
KeyWords: Elementary particle sources; Molecules; Nanocrystals; Optical properties; Photonic devices; Photons; Polycyclic aromatic hydrocarbons; Quantum optics, Cryogenic temperatures; Integrated photonics; Organic molecules; Quantum emitters; Quantum technologies; Single molecule spectroscopy; Single photon emission; Single-photon source, Particle beams
DOI: 10.1021/acsnano.7b08810

Citations: 14
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