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Broadband near-infrared antireflection coatings fabricated by three-dimensional direct laser writing
Univ N Carolina, NC 28223 USA.
Univ N Carolina, NC 28223 USA.
Univ N Carolina, NC 28223 USA.
US CONEC, NC 28602 USA.
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2018 (English)In: Optics Letters, ISSN 0146-9592, E-ISSN 1539-4794, Vol. 43, no 2, p. 239-242Article in journal (Refereed) Published
Abstract [en]

Three-dimensional direct laser writing via two-photon polymerization is used to fabricate anti-reflective structured surfaces (ARSSs) composed of subwavelength conicoid features optimized to operate over a wide bandwidth in the near-infrared range from 3700 cm(-1) to 6600 cm(-1) (2.7-1.52 mu m). Analytic Bruggemann effectivemediumcalculations are used to predict nominal geometric parameters such as the fill factor of the constitutive conicoid features of the anti-reflective structured surfaces (ARSSs) presented here. The performance of the ARSSs was investigated experimentally using infrared reflection and transmission measurements. An enhancement of the transmittance by 1.35%-2.14% over a broadband spectral range from 3700 cm(-1) to 6600 cm(-1) (2.7-1.52 mu m) was achieved. We further report on finite-element-based reflection and transmission data using three-dimensional (3D) model geometries for comparison. A good agreement between experimental results and the finite-element-based numerical analysis is observed once as-fabricated deviations from the nominal conicoid forms are included in the model. 3D direct laser writing is demonstrated here as an efficient method for the fabrication and optimization of ARSSs designed for the infrared spectral range. (c) 2018 Optical Society of America

Place, publisher, year, edition, pages
OPTICAL SOC AMER , 2018. Vol. 43, no 2, p. 239-242
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URN: urn:nbn:se:liu:diva-145145DOI: 10.1364/OL.43.000239ISI: 000422801600021PubMedID: 29328249OAI: oai:DiVA.org:liu-145145DiVA, id: diva2:1182438
Note

Funding Agencies|National Science Foundation (NSF) [1624572]; Swedish Agency for Innovation Systems [2014-04712]

Available from: 2018-02-13 Created: 2018-02-13 Last updated: 2018-02-13

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