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Journal of the Optical Society of America B

Journal of the Optical Society of America B

| OPTICAL PHYSICS

  • Editor: Henry van Driel
  • Vol. 29, Iss. 6 — Jun. 1, 2012
  • pp: 1430–1435

Optical study of defects in lithium iodate α-LiIO3

Alexander P. Yelisseyev, Ludmila I. Isaenko, and Marina K. Starikova  »View Author Affiliations


JOSA B, Vol. 29, Issue 6, pp. 1430-1435 (2012)
http://dx.doi.org/10.1364/JOSAB.29.001430


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Abstract

Photoluminescence (PL) in two broad bands at 2.95 and 2.6 eV in lithium iodate α-LiIO3 is associated with self-trapped excitons and native point defects (supposedly oxygen vacancies), respectively, based on the luminescence excitation spectra and the PL temperature dependence. Free charge carriers may be captured by two types of shallow traps with thermal activation energies of 0.14 and 0.21 eV: they are responsible for crystal darkening at temperatures below 200 K. Spontaneous emission of α-LiIO3 during cooling or heating at temperatures T<200K is pyroluminescence, which occurs at dielectric breakdown in strong pyroelectric fields on the crystal surface and in its bulk as well as inside the channel defects.

© 2012 Optical Society of America

OCIS Codes
(300.1030) Spectroscopy : Absorption
(300.6250) Spectroscopy : Spectroscopy, condensed matter
(300.6280) Spectroscopy : Spectroscopy, fluorescence and luminescence

ToC Category:
Spectroscopy

History
Original Manuscript: December 8, 2011
Manuscript Accepted: March 21, 2012
Published: May 25, 2012

Citation
Alexander P. Yelisseyev, Ludmila I. Isaenko, and Marina K. Starikova, "Optical study of defects in lithium iodate α-LiIO3," J. Opt. Soc. Am. B 29, 1430-1435 (2012)
http://www.opticsinfobase.org/josab/abstract.cfm?URI=josab-29-6-1430

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