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

Year: 2018

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

Autors Affiliation: Dipartimento di Fisica ed Astronomia, Università di Firenze, Via Sansone 1, I-50019 Sesto F.no, Firenze, Italy; CNR-INO, Istituto Nazionale di Ottica, Via Carrara 1, 50019 Sesto F.no, Firenze, Italy; LENS and Università di Firenze, Via Carrara 1, 50019 Sesto F.no, Firenze, Italy; CNR-ISC Istituto dei Sistemi Complessi, Via Madonna del Piano 10, I-50019 Sesto F.no, Firenze, Italy; QSTAR, Largo Fermi 2, I-50125 Firenze, 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 singlephoton
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

KeyWords: nanocrystals, single-photon sources, quantum emitters, single-molecule spectroscopy, organic molecules
DOI: 10.1021/acsnano.7b08810

Citations: 38
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