04. Shilova G. V., Zverev P. G., Ivleva L. I. Generacija vtoroj garmoniki v poroshkah kristallov niobata barija stroncija

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UDK 548:546.42:546.431

SECOND HARMONIC GENERATION IN POWDERED STRONTIUM BARIUM NIOBATE CRYSTALS

Shilova Galina Valer’evna
(student of Moscow Power Engineering Institute (Moscow, Russia), This email address is being protected from spambots. You need JavaScript enabled to view it.)

Zverev Petr Georgievich
(head of Laboratory, Prokhorov General Physics Institute of the Russian Academy of Sciences (Moscow, Russia), Doktor Nauk degree holder in Physical and Mathematical sciences, This email address is being protected from spambots. You need JavaScript enabled to view it.)

Ivleva Lyudmila Ivanovna
(head of Laboratory, Prokhorov General Physics Institute of the Russian Academy of Sciences (Moscow, Russia), Doktor Nauk degree holder in Technical sciences, This email address is being protected from spambots. You need JavaScript enabled to view it.)

The work is devoted to the investigation of phase transitions using second harmonic gen- eration (SHG) in strontium barium niobate (SBN) powders. In the bulk SBN crystals the phase matching conditions for SHG of 1064 nm radiation cannot be satisfied. Powders of SBN crystals with average size equaled to coherence length were investigated in the paper. The obtained experimental energy dependencies are described by the quadratic law that corresponded to the second order nonlinear process. It was found that the increase of crys- tal temperature resulted in the reduction of SHG efficiency is caused by phase transition of the crystal from ferroelectric to paraelectric phase. The phase transition temperatures for pure and doped SBN crystals were determined.

Keywords: second harmonic generation, nonlinear crystals, strontium barium niobate, phase transition.

For citation: Shilova G. V., Zverev P. G., Ivleva L. I. Generacija vtoroj garmoniki v poroshkah kristallov niobata barija stroncija [Second Harmonic Generation In Powdered Strontium Barium Niobate Crystals]. Vestnik Mordovskogo Universiteta – Mordovia University Bulletin. 2014, no. 1, pp. 43 – 49.

This work is licensed under a Creative Commons Attribution 4.0 License.