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Journal of the Optical Society of America B

Journal of the Optical Society of America B


  • Vol. 19, Iss. 1 — Jan. 1, 2002
  • pp: 37–42

Bulk and near-surface second-order nonlinearities generated in a BK7 soft glass by thermal poling

Mingxin Qiu, Toru Mizunami, Ramon Vilaseca, Francesc Pi, and Gaspar Orriols  »View Author Affiliations

JOSA B, Vol. 19, Issue 1, pp. 37-42 (2002)

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Bulk second-order nonlinearity was generated in BK7 glass at a higher temperature and with a longer poling time than near-surface second-order nonlinearity. The temporal decay of the bulk second-order nonlinearity was slower than that of the near-surface second-order nonlinearity. The thickness of the near-surface nonlinear layer increased with poling time. Poled BK7 glass was also measured by x-ray photoelectron spectroscopy. Depletion of Na at the anodic surface and its accumulation at the cathodic surface was observed. At the cathodic surface, a higher-energy peak near O (1s) appeared, which shows peroxy-radical defects. At the anodic surface, a lower-energy peak near Si (2p) appeared, which may be attributed to E centers or to two-coordinated Si defects. The mechanisms of generation of these defects and of the second-order nonlinearities are discussed.

© 2002 Optical Society of America

OCIS Codes
(160.2750) Materials : Glass and other amorphous materials
(160.4330) Materials : Nonlinear optical materials
(190.4160) Nonlinear optics : Multiharmonic generation
(190.4350) Nonlinear optics : Nonlinear optics at surfaces
(240.4350) Optics at surfaces : Nonlinear optics at surfaces

Mingxin Qiu, Toru Mizunami, Ramon Vilaseca, Francesc Pi, and Gaspar Orriols, "Bulk and near-surface second-order nonlinearities generated in a BK7 soft glass by thermal poling," J. Opt. Soc. Am. B 19, 37-42 (2002)

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