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EPJ Web of Conferences

Technology of obtaining fine textured films for femtosecond instrumentation based on photon echo

R.W. Belyaev, А. У. Бахадуров, N.S. Vashourin, K.Sh. Gazizov, A. N. Musanov, Д. А. Никитин, I.I. Popov, A. V. Moroz, S.A. Stepanov, Николай Иванович Сушенцов

Published Jan 1, 2017• 1 citation
Publisher

Abstract

This paper presents the technological approaches to the creation of thin textured films by the method of magnetron sputtering with parameters ensuring excitation of detected photon echo signals in them and the adjusted metrological characteristics of devices on a photon echo.
DOI
10.1051/epjconf/201716103006

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Abstract A way of obtaining new thin-film materials for forming photon echoes at room temperature on special exciton states in thin textured films obtained via magnetron sputtering is proposed, along with a model that explains the properties of new states and is associated with the formation of special exciton states. The dependence of the relaxation times of resonant transitions on the size of nanoscale clusters of surface defects is investigated for different film thicknesses and various semiconductor materials. Prospects for using such materials in medical technology are determined.
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Periodic modulation of the decay of a stimulated photon echo (SPE), formed in a three-layer textured thin ZnO/Si (P)/Si(B) film with a longitudinal uniform magnetic field upon increasing the time interval between the exciting pulses, is recorded in experiments. The shape of the modulated SPE decay curve changes for different values of time interval between the first two exciting pulses. The g -factor of the quantum transition is estimated from the period of modulation. The value of the g -factor is used to reach a conclusion on the formation of photon echoes on localized complex exciton states of the trion type.