Modeling Weakly Scattering Random Media: A Tool to Resolve the Internal Structure of Nanoporous Materials
Nanoporous media scatter a small fraction of the light propagating through them, even if pore sizes are significantly smaller than the characteristic visible wavelengths. The disordered spatial modulation of the refractive index at the few or few tens of nanometers length scale, resulting from the p...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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Wiley-VCH
2023-05-01
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| Series: | Advanced Photonics Research |
| Subjects: | |
| Online Access: | https://doi.org/10.1002/adpr.202200267 |
| _version_ | 1797833404213886976 |
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| author | Alberto Jiménez-Solano José María Miranda-Muñoz Sol Carretero-Palacios Hernán Míguez |
| author_facet | Alberto Jiménez-Solano José María Miranda-Muñoz Sol Carretero-Palacios Hernán Míguez |
| author_sort | Alberto Jiménez-Solano |
| collection | DOAJ |
| description | Nanoporous media scatter a small fraction of the light propagating through them, even if pore sizes are significantly smaller than the characteristic visible wavelengths. The disordered spatial modulation of the refractive index at the few or few tens of nanometers length scale, resulting from the presence of randomly distributed air bubbles or solid aggregates within a continuous solid background, gives rise to these weak scattering effects. However, standard theoretical approaches to describe this kind of media use effective medium approximations that do not account for diffuse, ballistic, and specular components. Herein, all spectral components and the angular distribution of the scattered light are captured through optical modeling. A Monte Carlo approach, combining scattering Mie theory and Fresnel equations, implemented within a genetic algorithm, allows us to decode the void and aggregate size distribution and hence the internal structure of a nanocrystalline titania (TiO2) film chosen as a paradigmatic example. The approach allows to generically describe the scattering properties of nanoporous materials which, as shown herein, may be used to decipher their internal structure from the fitting of their far‐optical field properties. |
| first_indexed | 2024-04-09T14:23:40Z |
| format | Article |
| id | doaj.art-2c3e566230b8441aa528ade69ef8b2d7 |
| institution | Directory Open Access Journal |
| issn | 2699-9293 |
| language | English |
| last_indexed | 2024-04-09T14:23:40Z |
| publishDate | 2023-05-01 |
| publisher | Wiley-VCH |
| record_format | Article |
| series | Advanced Photonics Research |
| spelling | doaj.art-2c3e566230b8441aa528ade69ef8b2d72023-05-04T12:49:11ZengWiley-VCHAdvanced Photonics Research2699-92932023-05-0145n/an/a10.1002/adpr.202200267Modeling Weakly Scattering Random Media: A Tool to Resolve the Internal Structure of Nanoporous MaterialsAlberto Jiménez-Solano0José María Miranda-Muñoz1Sol Carretero-Palacios2Hernán Míguez3Departamento de Física Universidad de Córdoba Edificio Einstein (C2) Campus de Rabanales 14071 Córdoba SpainInstituto de Ciencia de Materiales de Sevilla Consejo Superior de Investigaciones Científicas – Universidad de Sevilla (CSIC-US) Américo Vespucio 49 4109 Seville SpainDepartamento de Física de Materiales and Instituto Nicolás Cabrera Universidad Autónoma de Madrid Campus de Cantoblanco 28049 Madrid SpainInstituto de Ciencia de Materiales de Sevilla Consejo Superior de Investigaciones Científicas – Universidad de Sevilla (CSIC-US) Américo Vespucio 49 4109 Seville SpainNanoporous media scatter a small fraction of the light propagating through them, even if pore sizes are significantly smaller than the characteristic visible wavelengths. The disordered spatial modulation of the refractive index at the few or few tens of nanometers length scale, resulting from the presence of randomly distributed air bubbles or solid aggregates within a continuous solid background, gives rise to these weak scattering effects. However, standard theoretical approaches to describe this kind of media use effective medium approximations that do not account for diffuse, ballistic, and specular components. Herein, all spectral components and the angular distribution of the scattered light are captured through optical modeling. A Monte Carlo approach, combining scattering Mie theory and Fresnel equations, implemented within a genetic algorithm, allows us to decode the void and aggregate size distribution and hence the internal structure of a nanocrystalline titania (TiO2) film chosen as a paradigmatic example. The approach allows to generically describe the scattering properties of nanoporous materials which, as shown herein, may be used to decipher their internal structure from the fitting of their far‐optical field properties.https://doi.org/10.1002/adpr.202200267diffuse lightoptical disordersporous materialstheoretical modelingTiO2weakly scattering media |
| spellingShingle | Alberto Jiménez-Solano José María Miranda-Muñoz Sol Carretero-Palacios Hernán Míguez Modeling Weakly Scattering Random Media: A Tool to Resolve the Internal Structure of Nanoporous Materials Advanced Photonics Research diffuse light optical disorders porous materials theoretical modeling TiO2 weakly scattering media |
| title | Modeling Weakly Scattering Random Media: A Tool to Resolve the Internal Structure of Nanoporous Materials |
| title_full | Modeling Weakly Scattering Random Media: A Tool to Resolve the Internal Structure of Nanoporous Materials |
| title_fullStr | Modeling Weakly Scattering Random Media: A Tool to Resolve the Internal Structure of Nanoporous Materials |
| title_full_unstemmed | Modeling Weakly Scattering Random Media: A Tool to Resolve the Internal Structure of Nanoporous Materials |
| title_short | Modeling Weakly Scattering Random Media: A Tool to Resolve the Internal Structure of Nanoporous Materials |
| title_sort | modeling weakly scattering random media a tool to resolve the internal structure of nanoporous materials |
| topic | diffuse light optical disorders porous materials theoretical modeling TiO2 weakly scattering media |
| url | https://doi.org/10.1002/adpr.202200267 |
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