Second-harmonic generation was observed in chalcogenide glass irradiated by an electron beam. The second-harmonic intensity increased with increasing electron-beam current and accelerating voltage. The second-harmonic generation in glass was caused by the space-charge electrostatic field that was generated by irradiation of an electron beam. Second-order nonlinearity as great as 0.8 pm/V was obtained. The results of measurements of thermally stimulated depolarization current indicated that the glass was poled in the thin layers of its surface (several micrometers) and that the nonlinearity was stable.
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