Applied Physics B

, Volume 81, Issue 5, pp 651–655

Direct near infrared photorefractive recording and pre-exposure controlled hole–electron competition with enhanced recording in undoped Bi12TiO20

Authors

  • P.V. dos Santos
    • Laboratório de Óptica-Instituto de Física-IFGW-UNICAMP
    • Laboratório de Óptica-Instituto de Física-IFGW-UNICAMP
  • J.F. Carvalho
    • Instituto de FísicaUniversidade Federal de Goiás
Regular Paper

DOI: 10.1007/s00340-005-1935-x

Cite this article as:
dos Santos, P., Frejlich, J. & Carvalho, J. Appl. Phys. B (2005) 81: 651. doi:10.1007/s00340-005-1935-x

Abstract

We report the direct recording of electron-based photorefractive hologram in nominally undoped Bi12TiO20 crystals using 780 nm wavelength light without pre-exposure or any kind of previous processing. A lower intensity absorption grating is also detected. Pre-exposure with shorter wavelength produces an extended lifetime hole-based complementary grating on another photoactive center level and leads to enhanced recording.

Copyright information

© Springer-Verlag 2005