Highly photo-stable Perovskite nanocubes: towards integrated single photon sources based on tapered nanofibers

Stefano Pierini (1) , Marianna d'Amato (2) , Mayank Goyal (3, 4, 5) , Quentin Glorieux (2) , Elisabeth Giacobino (2) , Emmanuel Lhuillier (5) , Christophe Couteau (1) , Alberto Bramati (2)

1 L2n - Lumière, nanomatériaux et nanotechnologies
2 LKB (Jussieu) - Laboratoire Kastler Brossel
3 SU - Sorbonne Université
4 IISER Pune - Indian Institute of Science Education and Research Pune
5 INSP-E6 - Physico-chimie et dynamique des surfaces

The interest in perovskite nanocrystals (NCs) such as CsPbBr$_3$ for quantum applications is rapidly raising, as it has been demonstrated that they can behave as very efficient single photon emitters. The main problem to tackle in this context is their photo-stability under optical excitation. In this article, we present a full analysis of the optical and quantum properties of highly efficient perovskite nanocubes synthesized with an established method, which is used for the first time to produce quantum emitters, and is shown to ensure an increased photostability. These emitters exhibit reduced blinking together with a strong photon antibunching. Remarkably these features are hardly affected by the increase of the excitation intensity well above the emission saturation levels. Finally, we achieve for the first time the coupling of a single perovskite nanocube with a tapered optical nanofiber in order to aim for a compact integrated single photon source for future applications.

Keywords: perovskites; nanocrystal; fiber; single photon

Domains: Optics / Photonic; Physics [physics]; Condensed Matter [cond-mat]; Material chemistry

Stefano Pierini, Marianna d'Amato, Mayank Goyal, Quentin Glorieux, Elisabeth Giacobino, et al.. Highly photo-stable Perovskite nanocubes: towards integrated single photon sources based on tapered nanofibers. ACS photonics, 2020, 7, pp.2265. ⟨10.1021/acsphotonics.0c00820⟩. ⟨hal-02615835⟩