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  <doc>
    <id>1566</id>
    <completedYear>2022</completedYear>
    <publishedYear/>
    <thesisYearAccepted/>
    <language>eng</language>
    <pageFirst>204</pageFirst>
    <pageLast>224</pageLast>
    <pageNumber/>
    <edition/>
    <issue>1</issue>
    <volume>12</volume>
    <type>article</type>
    <publisherName>Optica Publishing Group</publisherName>
    <publisherPlace/>
    <creatingCorporation/>
    <contributingCorporation/>
    <belongsToBibliography>1</belongsToBibliography>
    <completedDate>--</completedDate>
    <publishedDate>--</publishedDate>
    <thesisDateAccepted>--</thesisDateAccepted>
    <title language="eng">Determination of optical constants and scattering properties of transparent polymers for use in optoelectronics</title>
    <abstract language="eng">Knowledge of optical constants, i.e. refractive index n and extinction coefficient k, and light scattering properties of optical polymers are required to optimize micro-optics for light-emitting diodes in terms of efficiency, color properties and light distribution. We present here a model-based diagnostic approach to determine the optical properties of polymers, which should be particularly useful in the development of plastics for optical applications. Optical constants and scattering coefficients were obtained from transmission and reflection measurements in a wavelength range from UV to NIR taking into account scattering effects due to rough surfaces and volume inhomogeneity. Based on the models for the dielectric function, the molecular optical transition energies Eg, critical point energies, Urbach energies and exciton transition energies were determined. Rayleigh and Mie scattering model and van de Hulst&amp;#x0027;s anomalous diffraction theory were applied to characterize scattering due to volume inhomogeneities. Scalar diffraction theory was applied to account for surface roughness scattering. Atomic force microscopy with nanomechanical characterization was used to characterize domains in size and shape and to assign optical scattering to a suitable morphological model. The combined optical and mechanical characterization help to improve the qualification of new polymer materials for optical applications.</abstract>
    <parentTitle language="eng">Optical Materials Express</parentTitle>
    <identifier type="urn">urn:nbn:de:kobv:526-opus4-15666</identifier>
    <enrichment key="opus.import.date">2021-12-21T08:26:00+00:00</enrichment>
    <enrichment key="opus.source">sword</enrichment>
    <enrichment key="opus.import.user">sword</enrichment>
    <enrichment key="opus.import.file">filename=phpay2w6Y</enrichment>
    <enrichment key="opus.import.checksum">23dcbe58578007453f29f8dd3083c8bd</enrichment>
    <enrichment key="DOI_VoR">https://doi.org/10.1364/OME.434715</enrichment>
    <enrichment key="SourceTitle">Joachim Bauer, Oksana Fursenko, Friedhelm Heinrich, Marko Gutke, Eckhart Kornejew, Oliver Broedel, Birgit Dietzel, Alexander Kaltenbach, Martin Burkhardt, Matthias Edling, Patrick Steglich, Michael Herzog, and Sigurd Schrader, "Determination of optical constants and scattering properties of transparent polymers for use in optoelectronics," Opt. Mater. Express 12, 204-224 (2022)</enrichment>
    <enrichment key="CopyrightInfo">© 2022 Optical Society of America. Users may use, reuse, and build upon the article, or use the article for text or data mining, so long as such uses are for non-commercial purposes and appropriate attribution is maintained. All other rights are reserved.</enrichment>
    <licence>OSA Open Access Publishing Agreement</licence>
    <author>Joachim Bauer</author>
    <author>Oksana Fursenko</author>
    <author>Friedhelm Heinrich</author>
    <author>Marko Gutke</author>
    <author>Eckhart Kornejew</author>
    <author>Oliver Brödel</author>
    <author>Birgit Dietzel</author>
    <author>Alexander Kaltenbach</author>
    <author>Martin Burkhardt</author>
    <author>Matthias Edling</author>
    <author>Patrick Steglich</author>
    <author>Michael Herzog</author>
    <author>Sigurd Schrader</author>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>diffraction theory</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>light property</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>optical constant</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>optical material</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>optical property</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>scattering theory</value>
    </subject>
    <collection role="ddc" number="620">Ingenieurwissenschaften und zugeordnete Tätigkeiten</collection>
    <collection role="institutes" number="">Fachbereich Ingenieur- und Naturwissenschaften</collection>
    <collection role="open_access" number="">open_access</collection>
    <collection role="Import" number="import">Import</collection>
    <collection role="Funding" number="">Publikationsfonds der TH Wildau</collection>
    <collection role="green_open_access" number="1">Gold Open Access</collection>
    <thesisPublisher>Technische Hochschule Wildau</thesisPublisher>
    <file>https://opus4.kobv.de/opus4-th-wildau/files/1566/ome-12-1-204.pdf</file>
  </doc>
  <doc>
    <id>1347</id>
    <completedYear>2020</completedYear>
    <publishedYear/>
    <thesisYearAccepted/>
    <language>eng</language>
    <pageFirst>2085</pageFirst>
    <pageLast>2099</pageLast>
    <pageNumber/>
    <edition/>
    <issue>9</issue>
    <volume>10</volume>
    <type>article</type>
    <publisherName/>
    <publisherPlace/>
    <creatingCorporation/>
    <contributingCorporation/>
    <belongsToBibliography>1</belongsToBibliography>
    <completedDate>--</completedDate>
    <publishedDate>--</publishedDate>
    <thesisDateAccepted>--</thesisDateAccepted>
    <title language="eng">Novel UV-transparent 2-component polyurethane resin for chip-on-board LED micro lenses</title>
    <abstract language="eng">In this work we present a novel optical polymer system based on polyurethane elastomer components, which combines excellent UV transparency with high thermal stability, good hardness, high surface tension and long pot life. The material looks very promising for encapsulation and microlensing applications for chip-on-board (CoB) light-emitting diodes (LED). The extinction coefficient k, refractive index n, and bandgap parameters were derived from transmission and reflection measurements in a wavelength range of 200-890 nm. Thermogravimetry and differential scanning calorimetry were used to provide glass transition and degradation temperatures. The surface tension was determined by means of contact angle measurements. As proof of concept, a commercial InGaN-CoB-LED is used to demonstrate the suitability of the new material for the production of microlenses.</abstract>
    <parentTitle language="eng">Optical Materials Express</parentTitle>
    <identifier type="issn">2159-3930</identifier>
    <identifier type="urn">urn:nbn:de:kobv:526-opus4-13472</identifier>
    <enrichment key="opus.source">publish</enrichment>
    <enrichment key="CopyrightInfo">© 2020 Optical Society of America. Users may use, reuse, and build upon the article, or use the article for text or data mining, so long as such uses are for non-commercial purposes and appropriate attribution is maintained. All other rights are reserved.</enrichment>
    <enrichment key="DOI_VoR">https://doi.org/10.1364/OME.393844</enrichment>
    <licence>OSA Open Access Publishing Agreement</licence>
    <author>Joachim Bauer</author>
    <author>Marko Gutke</author>
    <author>Friedhelm Heinrich</author>
    <author>Matthias Edling</author>
    <author>Vesela Stoycheva</author>
    <author>Alexander Kaltenbach</author>
    <author>Martin Burkhardt</author>
    <author>Martin Gruenefeld</author>
    <author>Matthias Gamp</author>
    <author>Christoph Gerhard</author>
    <author>Patrick Steglich</author>
    <author>Sebastian Steffen</author>
    <author>Michael Herzog</author>
    <author>Christian Dreyer</author>
    <author>Sigurd Schrader</author>
    <collection role="ddc" number="621">Angewandte Physik</collection>
    <collection role="institutes" number="">Fachbereich Ingenieur- und Naturwissenschaften</collection>
    <collection role="open_access" number="">open_access</collection>
    <collection role="Funding" number="">DFG-geförderter Publikationsfonds</collection>
    <collection role="green_open_access" number="1">Gold Open Access</collection>
    <thesisPublisher>Technische Hochschule Wildau</thesisPublisher>
    <file>https://opus4.kobv.de/opus4-th-wildau/files/1347/ome-10-9-2085.pdf</file>
  </doc>
</export-example>
