0572074 - ÚFP 2024 RIV US eng J - Journal Article
Mach, Marek - Psota, Pavel - Žídek, Karel - Mokrý, Pavel
Compact lensless Fizeau holographic interferometry for imaging domain patterns in ferroelectric single crystals.
Applied Optics. Roč. 62, č. 10 (2023), s. 2522-2530. ISSN 1559-128X. E-ISSN 2155-3165
Institutional support: RVO:61389021
Keywords : Fizeau * interferometry * ferroelectric single crystals
OECD category: Optics (including laser optics and quantum optics)
Impact factor: 1.7, year: 2023
Method of publishing: Limited access
Result website:
https://opg.optica.org/ao/abstract.cfm?uri=ao-62-10-2522
DOI: https://doi.org/10.1364/AO.482379

Domain patterns in ferroelectric single crystals are physical systems that are fascinating from a theoretical point of view and essential for many applications. A compact lensless method for imaging domain patterns in ferroelectric single crystals based on a digital holographic Fizeau interferometer has been developed. This approach provides a large field-of-view image while maintaining a high spatial resolution. Furthermore, the double-pass approach increases the sensitivity of the measurement. The performance of the lensless digital holographic Fizeau interferometer is demonstrated by imaging the domain pattern in periodically poled lithium niobate. To display the domain patterns in the crystal, we have used an electro-optic phenomenon, which, when an external uniform electric field is applied to the sample, produces a difference in refractive index values in domains with different polarization states of the crystal lattice. Finally, the constructed digital holographic Fizeau interferometer is used to measure the difference in the index of refraction in the antiparallel ferroelectric domains in the external electric field. The lateral resolution of the developed method for ferroelectric domain imaging is discussed.

Permanent Link: https://hdl.handle.net/11104/0342910