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Phonon spectra and electro-optic properties of crystalline phases in proton-exchanged LiTaO 3 wave guides

Kostritskii, S. M. ; Korkishko, Yu. N. ; Fedorov, V. A. ; Maring, D. B. ; Tavlykaev, R. F. ; Ramaswamy, R. V.

Journal of Applied Physics, 01 February 2002, Vol.91(3), pp.930-938 [Periódico revisado por pares]

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  • Título:
    Phonon spectra and electro-optic properties of crystalline phases in proton-exchanged LiTaO 3 wave guides
  • Autor: Kostritskii, S. M. ; Korkishko, Yu. N. ; Fedorov, V. A. ; Maring, D. B. ; Tavlykaev, R. F. ; Ramaswamy, R. V.
  • Assuntos: Lasers, Optics, And Optoelectronics
  • É parte de: Journal of Applied Physics, 01 February 2002, Vol.91(3), pp.930-938
  • Descrição: Annealed proton-exchanged wave guides in X -cut LiTaO 3 were characterized by infrared reflection and Raman scattering spectroscopy. The measured spectra were related to the multiple crystalline phases of H x Li 1−x TaO 3 as identified by direct wave guide index profiling. Unique relationships were found to exist between the crystalline phases and corresponding spectra, which thus can be used to identify phase contents in a given wave guide. Vibrational bands of the studied spectra were correlated with the electro-optic properties of H x Li 1−x TaO 3 phases. Phase-dependent anisotropy of protonic conductivity was predicted based on the observed polarization dependence of OH libration bands. Finally, the electro-optic coefficient r 33 was theoretically estimated for all phases and compared with previously reported experimental data.
  • Idioma: Inglês

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