Digital holographic tomography method for 3D observation of domain patterns in ferroelectric single crystals

Pavel Mokrý; Pavel Psota; Kateřina Steiger; Jan Václavík; David Vápenka; Roman Doleček; Petr Vojtíšek; Juraj Sládek; Vít Lédl

doi:10.1117/12.2257327

11 November 2016 Digital holographic tomography method for 3D observation of domain patterns in ferroelectric single crystals

Pavel Mokrý, Pavel Psota, Kateřina Steiger, Jan Václavík, David Vápenka, Roman Doleček, Petr Vojtíšek, Juraj Sládek, Vít Lédl

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Proceedings Volume 10151, Optics and Measurement International Conference 2016; 101510J (2016) https://doi.org/10.1117/12.2257327
Event: Optics and Measurement 2016 International Conference, 2016, Liberec, Czech Republic

Abstract

We report on the development and implementation of the digital holographic tomography for the three-dimensio- nal (3D) observations of the domain patterns in the ferroelectric single crystals. Ferroelectric materials represent a group of materials, whose macroscopic dielectric, electromechanical, and elastic properties are greatly in uenced by the presence of domain patterns. Understanding the role of domain patterns on the aforementioned properties require the experimental techniques, which allow the precise 3D measurements of the spatial distribution of ferroelectric domains in the single crystal. Unfortunately, such techniques are rather limited at this time. The most frequently used piezoelectric atomic force microscopy allows 2D observations on the ferroelectric sample surface. Optical methods based on the birefringence measurements provide parameters of the domain patterns averaged over the sample volume. In this paper, we analyze the possibility that the spatial distribution of the ferroelectric domains can be obtained by means of the measurement of the wavefront deformation of the transmitted optical wave. We demonstrate that the spatial distribution of the ferroelectric domains can be determined by means of the measurement of the spatial distribution of the refractive index. Finally, it is demonstrated that the measurements of wavefront deformations generated in ferroelectric polydomain systems with small variations of the refractive index provide data, which can be further processed by means of the conventional tomographic methods.

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Pavel Mokrý, Pavel Psota, Kateřina Steiger, Jan Václavík, David Vápenka, Roman Doleček, Petr Vojtíšek, Juraj Sládek, and Vít Lédl "Digital holographic tomography method for 3D observation of domain patterns in ferroelectric single crystals", Proc. SPIE 10151, Optics and Measurement International Conference 2016, 101510J (11 November 2016); https://doi.org/10.1117/12.2257327

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KEYWORDS

Refractive index

Tomography

Crystals

Digital holography

Wavefronts

Holography

Electro optics

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