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Applied Optics

Applied Optics


  • Vol. 23, Iss. 12 — Jun. 15, 1984
  • pp: 1975–1979

Multiphoton interactions in rutile

Gerald A. Royce and Richard B. Kay  »View Author Affiliations

Applied Optics, Vol. 23, Issue 12, pp. 1975-1979 (1984)

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Laser-induced photoluminescence and photoconductivity in rutile crystal are described. Nd:YAG laser photons were employed which have energies of 1.16 eV (1.06 μm). This energy is just slightly more than ⅓ of the TiO2 band gap. Intensities between 105 and 106 W/cm2 were employed. The photoconductivity is shown to be produced by competing single- and two-photon events. The first-order and second-order photoconductivity cross sections are found to be 3.6 × 10−26 cm2 and 1.54 × 10−50 cm4 sec, respectively. A thermoluminescence study revealed traps with thermal ionization energies between 0.4 and 0.9 eV below the conduction band. Traps with photoionization energies ~1 and ~2 eV below the conduction band are believed to be responsible for the observed results and may or may not be due to alumina impurities known to exist in the samples.

© 1984 Optical Society of America

Original Manuscript: June 1, 1983
Published: June 15, 1984

Gerald A. Royce and Richard B. Kay, "Multiphoton interactions in rutile," Appl. Opt. 23, 1975-1979 (1984)

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