NDLI: Optical homogeneity, defects, and photorefractive properties of stoichiometric, congruent, and zinc-doped lithium niobate crystals

Content Provider	Springer Nature Link
Author	Sidorov, N. V. Yanichev, A. A. Palatnikov, M. N. Gabain, A. A. Pikoul, O. Yu.
Copyright Year	2014
Abstract	Using the laser-conoscopy method, the photorefractive light-scattering method, and the Raman light-scattering method, we have studied the structural and optical homogeneities and photorefractive properties of (i) stoichiometric lithium niobate crystals (LiNbO$_{3}$(stoich)), which were grown from a melt with 58.6 mol % of Li$_{2}$O; (ii) congruent crystals (LiNbO$_{3}$(congr)); and (iii) congruent crystals that were doped with Zn$^{2+}$ cations (LiNbO$_{3}$:Zn; [Zn] = 0.03–1.59 mol %). We have shown that the speckle-structure of the photorefractive light scattering in all the crystals is three-layer. The shapes of the second and third layers repeat in general the shape of the first layer. We have shown that the differences that are observed between the Raman spectra, the photorefractive light scattering, and the conoscopic patterns of the examined crystals are caused by the fact that defects are distributed inhomogeneously over the volume of these crystals and that Zn$^{2+}$ cations are incorporated inhomogeneously into the lattice. This leads to the appearance of local changes in the elastic characteristics of the crystal and to the appearance of mechanical stresses, which locally change the optical indicatrix and, correspondingly, the conoscopic pattern and the Raman spectrum.
Starting Page	72
Ending Page	81
Page Count	10
File Format	PDF
ISSN	0030400X
Journal	Optics and Spectroscopy
Volume Number	117
Issue Number	1
e-ISSN	15626911
Language	English
Publisher	Pleiades Publishing
Publisher Date	2014-07-25
Publisher Place	Moscow
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Optics, Optoelectronics, Plasmonics and Optical Devices
Content Type	Text
Resource Type	Article
Subject	Atomic and Molecular Physics, and Optics Electronic, Optical and Magnetic Materials

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