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Quantum Nature of Light in Nonstoichiometric Bulk Perovskites

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journal contribution
posted on 05.09.2019 by Daniel G. Suárez-Forero, Antonella Giuri, Milena De Giorgi, Laura Polimeno, Luisa De Marco, Francesco Todisco, Giuseppe Gigli, Lorenzo Dominici, Dario Ballarini, Vincenzo Ardizzone, Benny D. Belviso, Davide Altamura, Cinzia Giannini, Rosaria Brescia, Silvia Colella, Andrea Listorti, Carola Esposito Corcione, Aurora Rizzo, Daniele Sanvitto
Sources of single photons are a fundamental brick in the development of quantum information technologies. Great efforts have been made so far in the realization of reliable, highly efficient, and on demand quantum sources that could show an easy integration with quantum devices. This has recently culminated in the use of solid state quantum dots as promising candidates for future sources of quantum technologies. However, some challenges, like their complex fabrication, random distribution, and difficult integrability with silicon technology, could hinder their broad application, making necessary the study of alternative systems. In this work, we clearly demonstrate single photon emission from quantum dots formed in nonstoichiometric bulk perovskites. Their simple growing procedures, exceptional stability under constant illumination, easy control of their optical properties, as well as ease of integrability make these materials very interesting candidates for the development of quantum light sources in the near-infrared.