Proceedings ArticleDOI
Real-time phase-contrast analysis of domain switching in lithium niobate by digital holography
Simonetta Grilli,Pietro Ferraro,Marella de Angelis,Sergio De Nicola,Domenico Alfieri,Melania Paturzo,Paolo De Natale,Lucia Sansone,Giovanni Pierattini +8 more
- Vol. 5531, pp 112-120
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TLDR
In this article, the authors present a method for in-situ visualization of electric field domain reversal in congruent lithium niobate (LN) through an electro-optic interferometric technique.Abstract:
We present a method for in-situ visualization of electric field domain reversal in congruent lithium niobate (LN) through an electro-optic interferometric technique. The crystal refractive index n changes by the linear electro-optic and piezoelectric effects along the z crystal axis, due to the external electric field. This variation depends on the domain orientation so that two adjacent antiparallel domains present a refractive index difference equal to 2Dn which is used for in-situ visualization of the reversed domain pattern during formation. A digital holographic (DH) technique is employed for a two-dimensional (2D) reconstruction of the wavefield transmitted by the sample in amplitude and phase during the process. The corresponding amplitude-map and phase-map movies are presented. The amplitude-map gives qualitative information about the spatial evolution of the domain boundaries while the phase-map provides measurement of the 2D distribution of the phase shift induced along the z axis. The phase-map movies provide unequivocal information about the spatial distribution of the reversed domain regions. This technique can be used as in-situ monitoring method alternative to the measurement of the poling current which provides information only about the amount of charge delivered to the sample, ignoring the spatial distribution of the domain boundaries.read more
Citations
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Journal ArticleDOI
Ferroelectric domain patterns in barium titanate single crystals studied by means of digital holographic microscopy
TL;DR: In this paper, a digital holographic microscopy (DHM) was used to study the ferroelectric domain pattern in the whole volume of a single perovskite single crystal.
Journal ArticleDOI
Ferroelectric domain pattern in barium titanate single crystals studied by means of digital holographic microscopy
TL;DR: In this article, a digital holographic microscopy (DHM) was used for the detection of a ferroelectric domain pattern in the whole volume of a barium titanate single crystal by means of the Mach-Zehnder interferometer and numerical processing of data employs the angular spectrum method.
Journal ArticleDOI
Image plane digital holographic microscope for the inspection of ferroelectric single crystals
TL;DR: In this paper, the authors used image plane digital holographic microscopy (DHM) setup outcomes from a Mach-Zehnder type of interferometer and phase shifting digital holography.
Proceedings ArticleDOI
Characterization and engineering of ferroelectric microstructures by interferometric methods
Simonetta Grilli,Pietro Ferraro,Melania Paturzo,Domenico Alfieri,P. De Natale,M. de Angelis,S. De Nicola,Andrea Finizio,Giovanni Pierattini +8 more
TL;DR: In this article, an interferometric approach based on Digital Holography can provide a very useful tool for investigation and characterisation of materials and of the engineered structures for photonic band-gap structures.
Journal ArticleDOI
Two-dimensional mapping of electro-optic phase retardation in PLZT by digital holography
TL;DR: In this paper, the phase retardation induced by the electro-optic effect in lead lanthanum zirconate titanate (PLZT) is demonstrated by use of a digital holography method.