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Secondary Quantization of the Electromagnetic Field in Inhomogeneous Structures Based on Formalism of Scattering Matrix A.V. Belonovskiia,∗, K.M. Morozov, K.A. Ivanov and M.A. Kaliteevski St-Petersburg Academic University, Khlopina 8/3, 194021 St. Petersburg, Russia ITMO University, Kronverkskiy pr. 49, 197101 St. Petersburg, Russia Ioffe Institute, Politekhnicheskaya 26, 194021 St. Petersburg, Russia