19th Russian youth conference on physics of semiconductors and nanostructures, opto- and nanoelectronics (RYCPS 2017) : St. Petersburg, Russia : 27 November-1 December 2017 : RYCPS2017 : 19th Russian young conference on physics of semiconductors and nanostructures, opto- and nanoelectronics : Nov 2017, St. Petersburg, Russia.