Direct femtosecond laser printing of silk fibroin periodic structure with lower mid-infrared reflectivity

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dc.contributor.authorCouto, Filipe A.
dc.contributor.authorPaula, Kelly T.
dc.contributor.authorSantos, Moliria V.
dc.contributor.authorRibeiro, Sidney J.L. [UNESP]
dc.contributor.authorMendonça, Cleber R.
dc.contributor.institutionUniversidade de São Paulo (USP)
dc.contributor.institutionUniversidade Estadual Paulista (UNESP)
dc.date.accessioned2023-07-29T16:02:50Z
dc.date.available2023-07-29T16:02:50Z
dc.date.issued2023-01-01
dc.description.abstractPeriodic dielectric structures offer an efficient way to control light propagation at micro- and nanoscale, also presenting low losses. Among many techniques that can produce such structures, femtosecond Laser-Induced Forward Transfer (fs-LIFT) is a promising one due to its relatively simple implementation and ability to process broad classes of materials, preserving their integrity. In particular, Silk fibroin (SF), a natural biopolymer, can be processed by fs-LIFT to print well-ordered periodic arrays of microstructures. Due to its high transparency, biocompatibility, and high possibilities of functionalization, SF is a suitable material for photonics. In this work, a 2D lattice of hemi-elliptical SF microdroplets was fabricated via fs-LIFT, and finite-element (FEM) simulations were carried out to study their response to electromagnetic radiation in the near to mid-infrared spectral region, considering the influence of the substrate. The simulation results indicated a decrease in reflectivity which was corroborated with experimental results. In addition, coating the fabricated structures with a higher index dielectric material was shown to enhance the decrease in reflectivity in the mid-infrared spectral region. These results demonstrate a straightforward way to print ordered arrays of SF microstructures in a relatively large area, with potential application as controllable reflectivity coating for the near to mid-infrared spectral region.en
dc.description.affiliationSão Carlos Institute of Physics University of São Paulo, PO Box 369, SP
dc.description.affiliationInstitute of Chemistry São Paulo State University (UNESP), SP
dc.description.affiliationUnespInstitute of Chemistry São Paulo State University (UNESP), SP
dc.description.sponsorshipCoordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
dc.description.sponsorshipConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
dc.description.sponsorshipFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.description.sponsorshipIdFAPESP: 2018/11283–7
dc.description.sponsorshipIdFAPESP: 2020/08715–2
dc.identifierhttp://dx.doi.org/10.1016/j.optmat.2022.113335
dc.identifier.citationOptical Materials, v. 135.
dc.identifier.doi10.1016/j.optmat.2022.113335
dc.identifier.issn0925-3467
dc.identifier.scopus2-s2.0-85146221308
dc.identifier.urihttp://hdl.handle.net/11449/249551
dc.language.isoeng
dc.relation.ispartofOptical Materials
dc.sourceScopus
dc.titleDirect femtosecond laser printing of silk fibroin periodic structure with lower mid-infrared reflectivityen
dc.typeArtigo
unesp.author.orcid0000-0002-4779-0068[1]
unesp.author.orcid0000-0002-8162-6747[4]

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