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Terahertz-frequency dielectric anisotropy in three-dimensional polymethacrylates fabricated by stereolithography
Univ N Carolina, NC 28223 USA.
Univ N Carolina, NC 28223 USA.
Lasertel, AZ 85743 USA.
JA Woollam Co Inc, NE 68508 USA.
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2020 (English)In: Optics Letters, ISSN 0146-9592, E-ISSN 1539-4794, Vol. 45, no 7, p. 1982-1985Article in journal (Refereed) Published
Abstract [en]

The anisotropic optical dielectric functions of slanted. columnar layers fabricated using polymethacrylate based stereolithography are reported for the terahertz-frequency domain using generalized spectroscopic ellipsometry. The slanted columnar layers are composed of spatially coherent columnar structures with a diameter of 100 mu m and a length of 700 mu m that are tilted by 45 degrees with respect to the surface normal of the substrates. A simple biaxial (orthorhombic) layer homogenization approach is used to analyze the terahertz ellipsometric data obtained at three different sample azimuthal orientations. The permittivity along the major polarizability directions varies by almost 25%. Our results demonstrate that stereolithography allows tailoring of the polarizability and anisotropy of the host material, and provides a flexible alternative metamaterials fabrication method for the terahertz spectral range. (C) 2020 Optical Society of America

Place, publisher, year, edition, pages
OPTICAL SOC AMER , 2020. Vol. 45, no 7, p. 1982-1985
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URN: urn:nbn:se:liu:diva-165171DOI: 10.1364/OL.382988ISI: 000522794100098PubMedID: 32236047OAI: oai:DiVA.org:liu-165171DiVA, id: diva2:1424743
Note

Funding Agencies|National Science FoundationNational Science Foundation (NSF) [1624572]; VINNOVAVinnova [2014-04712]; Army Research Office [W911NF-14-1-0299]

Available from: 2020-04-20 Created: 2020-04-20 Last updated: 2020-04-20

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