Influence of the temperature-dependent spontaneous birefringence in the electro-optic measurements of LiNbO3

Aillerie, Michel; Fontana, M.D.; Abdi, Farid; Carabatos‐Nédelec, C.; Theofanous, N.; Alexakis, G.

doi:10.1063/1.342809

Cited by 65 publications

(32 citation statements)

References 11 publications

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“…The absolute values are also well reproduced by our method, especially if we take into account the fact that NLO properties are generally difficult to determine accurately. The experimental values are sensitive to external parameters such as temperature changes [23] and the stoichiometry of the samples. For example, using crystals of various compositions, Abdi and coworkers measured absolute values between 1.5 pm/V and 9.9 pm/V for r σ 22 [24].…”

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confidence: 99%

First-Principles Study of the Electro-Optic Effect in Ferroelectric Oxides

2004

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We first present a method to compute the electrooptic tensor from first principles, explicitly taking into account the electronic, ionic and piezoelectric contributions. We then study the non-linear optic behavior of three paradigmatic ferroelectric oxides. Our calculations reveal the dominant contribution of the soft mode to the electrooptic coefficients in LiNbO3 and BaTiO3 and its minor role in PbTiO3. We identify the coupling between the electric field and the polar atomic displacements along the B-O chains as the origin of the large electrooptic response in perovskite ABO3 compounds. Finding better EO materials is a desirable goal. However, the experimental characterization of optical nonlinearities requires high-quality single crystals that are not always directly accessible nor easy to make. Input from accurate theoretical calculations allowing to predict the non-linear optical behavior of crystalline solids would therefore be particularly useful.For many years, theoretical investigations of non-linear optical phenomena were restricted to semi-empirical approaches such as shell models [6] or bond-charge models [7,8]. In the last decade, significant theoretical advances have been reported concerning first-principles density functional theory (DFT) calculations of the behavior of periodic systems in an external electric field [9,10] and opened the way to direct predictions of various optical phenomena. Recently, particular attention has been paid to the calculation of non-linear optical (NLO) susceptibilities and Raman cross sections [11,12].In this Letter, we go one step further and present a method to predict the linear EO coefficients of periodic solids within DFT. Our method is very general, and can be applied to paradigmatic ferroelectric oxides : LiNbO 3 , BaTiO 3 and PbTiO 3 . We find that first-principles calculations are fully predictive, and provide significant new insights into the microscopic origin of the EO effect. In particular, we highlight the predominent role of the soft mode in the EO coupling of LiNbO 3 and BaTiO 3 , in contrast with its minor role in PbTiO 3 .At linear order, the dependence of the optical dielectric tensor ε ij on the static (or low-frequency) electric field E γ is described by the linear EO tensor r ijγ :Throughout this paper, we follow the convention of using Greek and Roman indexes (resp.) to label static and optical fields (resp.). We write all vector and tensor components in the system of cartesian coodinates defined by the principal axes of the crystal under zero field. We also refer to the atomic displacements τ κα [κ labels an atom and α a cartesian direction] within the basis defined by the zone-center transverse optic (TO) phonon eigendisplacements u m (κα):Let us first consider the clamped (zero strain) EO tensor, r η ijγ , in which all electric-field induced macroscopic strains η are forbidden. This is achieved experimentally by working at a frequency sufficiently high to avoid strain relaxations but low compared to the frequency of the TO modes. Within the ...

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confidence: 99%

First-Principles Study of the Electro-Optic Effect in Ferroelectric Oxides

2004

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“…Figure 1 is a schematic of a conventional EO coefficient measurement system. This system determines the EO coefficient by utilizing birefringence measurement in a method called the Senarmont method, 17) which is widely used because of its easy implementation. The Senarmont arrangement used in this study consisted of a laser light source, linear polarizer, sample, linear analyzer, and photodetector.…”

Section: Setup Of Microscopic Measurement System For Eo Effectmentioning

confidence: 99%

“…The aim of this study was to construct an EO effect measurement system for such micrometer-sized crystals. For this purpose, the Senarmont method, 17) which will be explained in the next chapter, was selected. This report describes the process of miniaturizing the measurement system.…”

Section: Introductionmentioning

confidence: 99%

Development of microscopic measurement system for electro-optic effect

Yamamoto

Hoshina

Takeda

et al. 2015

J. Ceram. Soc. Japan

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This paper reports a microscopic electro-optic (EO) effect measurement system that is based on the Senarmont method and enables measurement of the EO coefficients (Kerr coefficients) of submillimeter-sized crystalline materials. In this study, an estimation of the electric field applied to the crystalline sample was performed with a finite-element method because the parallel plate electrodes were required to be on the same side of the sample surface. Reproducible values of the EO coefficients of submillimeter-sized (Pb,La)(Zr,Ti)O 3 transparent ceramics were obtained only if this estimation was taken into account. This system will effectively increase the speed of searches for new EO materials.

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“…Table II allows to discuss these and similar effects as magnetoelectric optical effects [5,7,8,10], the magnetooptical effects in dispersive medium, and so on. The theoretical analyses [9,11] and the interpretations of experimental data given by experimenters [5,12,13] have been based up to the present on the tables given in the monographs [14] (see: Refs. [9,[11][12][13]) and [15] (see: Ref.…”

Section: Introductionmentioning

confidence: 99%

“…The theoretical analyses [9,11] and the interpretations of experimental data given by experimenters [5,12,13] have been based up to the present on the tables given in the monographs [14] (see: Refs. [9,[11][12][13]) and [15] (see: Ref. [5]).…”

Section: Introductionmentioning

confidence: 99%

The Symmetry and Optical Phenomena

Malinowski

1991

Acta Phys. Pol. A

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The explicit forms of the broken (by a electric field E, magnetic field H and spatial dispersion of wave vector k) point symmetry groups of a crystal are given. For these groups the dielectric permeability tensors: εij (ω, E), éij (ω, H) and εi j (ω, k) -the particular cases of eij (ω, E, H, k) -are written out (the susceptibility tensors x,, (ω, E), χij (ω, H) and χij (ω, k) take the same forms). In order to illustrate the results obtained the electrooptical phenomena (connected with the tensors (ω, E)) are discussed.

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Influence of the temperature-dependent spontaneous birefringence in the electro-optic measurements of LiNbO3

Cited by 65 publications

References 11 publications

First-Principles Study of the Electro-Optic Effect in Ferroelectric Oxides

First-Principles Study of the Electro-Optic Effect in Ferroelectric Oxides

Development of microscopic measurement system for electro-optic effect

The Symmetry and Optical Phenomena

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