Editorial Preface

The 23 rd Russian Youth Conference on Physics of Semiconductors and Nanostructures, Opto- and Nanoelectronics (RYCPS) was held in Saint Petersburg on November 23 – 26, 2021. It was organized by Peter the Great St. Petersburg Polytechnic University. The program of the Conference included semiconductor technology, heterostructures with quantum wells and quantum dots, bulk properties of semiconductors, opto- and nanoelectronic devices and new materials. Given the restrictions on meetings of a large number of people associated with COVID-19, the organizing committee of the conference decided to hold it in a virtual format. The oral sessions were held on the Zoom platform, and the poster session was organized using the Miro online whiteboard and the Skype platform. This provided an opportunity for valuable discussions between the conference participants and experienced scientists. The conference included two invited talks given by leading scientists from Ioffe Institute, devoted to actual problems and major advances in physics and technology. The keynote speakers were Anton Vershovskii (presentation "Optical quantum sensors based on thermal atoms and atom-like structures") and Mikhail Glazov (presentation "Spin noise in semiconductors"). Students, graduate and postgraduate students presented their results on plenary and poster sessions. The total number of accepted abstracts published in Russian (the official conference language) was 105. Here we publish 24 selected papers in English. Like previous years, the participants were involved in the competition for the best report. Certificates and cash prizes were awarded to a number of participants for the presentations selected by the Program Committee. Alexey Kuznetsov (Alferov University, Saint Petersburg) was awarded for the best presentation among students with a report "Influence of plasmonic effects on the localization of electromagnetic waves in GaP nanowires". Sergey Savchenko (Ural Federal University, Yekaterinburg) was awarded for the best presentation among postgraduate students with a report "Thermal quenching of luminescence of excitons and defect centers in InP/ZnS quantum dots". Works with potential applications were recommended for participation in the following competition for support from the Russian Foundation for Assistance to Small Innovative Enterprises in Science and Technology. List of Editors, Organizers, Sponsors, Program Committee, Organizing Committee are available in this pdf.