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Demonstration of terahertz ferroelectric metasurface using a simple and scalable fabrication method
KTH, School of Engineering Sciences (SCI), Applied Physics, Laser Physics. Zhejiang Univ, Coll Opt Sci & Engn, State Key Lab Modern Opt Instrumentat, Hangzhou 310027, Zhejiang, Peoples R China..
KTH, School of Engineering Sciences (SCI), Applied Physics, Laser Physics.ORCID iD: 0000-0001-7688-1367
KTH, School of Engineering Sciences (SCI), Applied Physics, Laser Physics.ORCID iD: 0000-0002-2508-391X
Zhejiang Univ, Coll Opt Sci & Engn, State Key Lab Modern Opt Instrumentat, Hangzhou 310027, Zhejiang, Peoples R China.;Westlake Univ, Westlake Inst Adv Study, Inst Adv Technol, Hangzhou 310024, Zhejiang, Peoples R China..
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2018 (English)In: Optics Express, ISSN 1094-4087, E-ISSN 1094-4087, Vol. 26, no 21, p. 27917-27930Article in journal (Refereed) Published
Abstract [en]

We report on experimental implementation of a ferroelectric metasurface using an x-cut KTiOPO4 (KTP) crystal for efficient manipulation of terahertz (THz) radiation. Based on the multipolar resonances that are accommodated in KTP micro-blocks in a square array, the metasurface is fabricated by precision diamond-blade dicing. Adjusting the size of the KTP micro-blocks to tailor the relative spectral positions of the anisotropic multipolar resonances, we demonstrate a subwavelength-thin THz polarizer that functions as a transparent film in the y-direction and a magnetic mirror in the z-direction with a transmission contrast of 13 dB near 0.37 THz (820 mu m). The ferroelectric-based all-dielectric metasurface will provide a versatile platform to engineer the THz waves in the far field and could potentially be combined with THz generation in the same material.

Place, publisher, year, edition, pages
Optical Society of America, 2018. Vol. 26, no 21, p. 27917-27930
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URN: urn:nbn:se:kth:diva-238123DOI: 10.1364/OE.26.027917ISI: 000447287700086Scopus ID: 2-s2.0-85055031905OAI: oai:DiVA.org:kth-238123DiVA, id: diva2:1264340
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QC 20181120

Available from: 2018-11-20 Created: 2018-11-20 Last updated: 2018-12-07Bibliographically approved

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Tian, JingyiLaurell, FredrikPasiskevicius, ValdasJang, Hoon

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