Investigation of ferroelectric domain walls in periodically-poled LiNbO3 single crystals by polarization-sensitive optical coherence tomography

Jonas Golde; Michael Rüsing; Richard Kindler; Svea Steuer; Jan Rix; Lukas M. Eng; Edmund Koch

doi:10.1117/12.2608470

1 April 2022 Investigation of ferroelectric domain walls in periodically-poled LiNbO₃ single crystals by polarization-sensitive optical coherence tomography

Jonas Golde, Michael Rüsing, Richard Kindler, Svea Steuer, Jan Rix, Lukas M. Eng, Edmund Koch

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Proceedings Volume PC11997, Optical Components and Materials XIX; PC1199705 (2022) https://doi.org/10.1117/12.2608470
Event: SPIE OPTO, 2022, San Francisco, California, United States

Abstract

Domain walls (DWs) in ferroelectric materials are of highest interest as integrated functional elements, for instance in optoelectronic nanodevices. We investigated individual ferroelectric DWs in periodically-poled LiNbO3 single crystals by applying polarization-sensitive optical coherence tomography (PS-OCT). Comparing our experimental results with circular light polarization to simulations, we conclude that the three different signals recorded from each DW are associated to both the ordinary and extraordinary refractive index, and to a third contribution that arises from the mean value of the two. PS-OCT hence provides a valuable tool to probe the relevant electro-optical properties close to and at the DWs.

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Jonas Golde, Michael Rüsing, Richard Kindler, Svea Steuer, Jan Rix, Lukas M. Eng, and Edmund Koch "Investigation of ferroelectric domain walls in periodically-poled LiNbO₃ single crystals by polarization-sensitive optical coherence tomography", Proc. SPIE PC11997, Optical Components and Materials XIX, PC1199705 (1 April 2022); https://doi.org/10.1117/12.2608470

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