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Near-field terahertz imaging of ferroelectric domains in barium titanate
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SYSNO ASEP 0354486 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název Near-field terahertz imaging of ferroelectric domains in barium titanate Tvůrce(i) Berta, Milan (FZU-D) ORCID
Kadlec, Filip (FZU-D) RID, ORCID, SAIZdroj.dok. Phase Transitions. - : Taylor & Francis - ISSN 0141-1594
Roč. 83, 10-11 (2010), 985-993Poč.str. 9 s. Jazyk dok. eng - angličtina Země vyd. GB - Velká Británie Klíč. slova singular value decomposition ; domain structure imaging ; near-field terahertz microscopy ; subwavelength resolution Vědní obor RIV BM - Fyzika pevných látek a magnetismus CEP LC512 GA MŠMT - Ministerstvo školství, mládeže a tělovýchovy CEZ AV0Z10100520 - FZU-D (2005-2011) UT WOS 000284539500026 DOI 10.1080/01411594.2010.509611 Anotace We report on results of a near-field imaging experiment with broadband terahertz pulses applied to a BaTiO3 multidomain single crystal. Data with a spatial resolution below 15 mm were collected by scanning time-domain terahertz imaging setup.We performed the scanning by an asymmetric skewed sapphire probe metallised from two sides ended with a 60 mm  140 mm facet. The imaging scans were performed with various angles of the polarisation of the probing field with respect to the direction of the domain walls in order to identify the orientations with optimal sensitivity. The raw experimental data were prewhitened and processed by the singular value decomposition. In this way, independent components belonging to experimental features (polarisation, noise and external perturbations) were found. The spatial resolution of the sensing probe was found significantly higher than that allowed by the outer dimensions of the probe end facet. This result was also confirmed by field simulations. Pracoviště Fyzikální ústav Kontakt Kristina Potocká, potocka@fzu.cz, Tel.: 220 318 579 Rok sběru 2011
Počet záznamů: 1