Single Photon Emitters Arrays by Capillary Assembly of Colloidal Semiconductor CdSe/CdS Nanocrystals
Matteo Barelli a, Cynthia Vidal b, Sergio Fiorito a, Vincenzo Aglieri a, Alina Myslovska c, Riccardo Sapieza b, Iwan Moreels c, Francesco Di Stasio a
a Istituto Italiano di Tecnologia, Via Morego, 30, Genova, Italy
b Imperial College London, Exhibition Road, United Kingdom
c Ghent University, Technology Campus, iGent, Ghent, Belgium
Materials for Sustainable Development Conference (MATSUS)
Proceedings of nanoGe Spring Meeting 2022 (NSM22)
#NANOQ22. Colloidal Semiconductor nanocrystals for Quantum Technologies
Online, Spain, 2022 March 7th - 11th
Organizers: Francesco Di Stasio, Iwan Moreels and Riccardo Sapienza
Contributed talk, Matteo Barelli, presentation 038
DOI: https://doi.org/10.29363/nanoge.nsm.2022.038
Publication date: 7th February 2022

Periodic arrays of nanoholes are patterned by electron beam lithography (EBL) upon a 170 µm thick glass coverslip, after the deposition of a sputter coated Indium Tin Oxide (ITO) and a spin coated polymethyl methacrylate (PMMA) electronic resist thin films. Colloidal semiconductor giant core/shell CdSe/CdS nanocrystals, shielded by an additional silica layer, are then trapped with remarkable efficiency into the PMMA holes by a capillary assembly method based on a finely tuned drop casting process. The resulting planar solid state arrays of semiconductor quantum dots demonstrate single photon emission properties, studied in detail by photoluminesce and second order photon correlation measurements.

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