dc.contributor.author
Ghobara, Mohamed Mahmoud Essam
dc.contributor.author
Oschatz, Cathleen
dc.contributor.author
Fratzl, Peter
dc.contributor.author
Reissig, Louisa
dc.date.accessioned
2024-03-06T12:19:05Z
dc.date.available
2024-03-06T12:19:05Z
dc.identifier.uri
https://refubium.fu-berlin.de/handle/fub188/42532
dc.identifier.uri
http://dx.doi.org/10.17169/refubium-42256
dc.description.abstract
Siliceous diatom frustules present a huge variety of shapes and nanometric pore patterns. A better understanding of the light modulation by these frustules is required to determine whether or not they might have photobiological roles besides their possible utilization as building blocks in photonic applications. In this study, we propose a novel approach for analyzing the near-field light modulation by small pennate diatom frustules, utilizing the frustule of Gomphonema parvulum as a model. Numerical analysis was carried out for the wave propagation across selected 2D cross-sections in a statistically representative 3D model for the valve based on the finite element frequency domain method. The influences of light wavelength (vacuum wavelengths from 300 to 800 nm) and refractive index changes, as well as structural parameters, on the light modulation were investigated and compared to theoretical predictions when possible. The results showed complex interference patterns resulting from the overlay of different optical phenomena, which can be explained by the presence of a few integrated optical components in the valve. Moreover, studies on the complete frustule in an aqueous medium allow the discussion of its possible photobiological relevance. Furthermore, our results may enable the simple screening of unstudied pennate frustules for photonic applications.
en
dc.format.extent
32 Seiten
dc.rights.uri
https://creativecommons.org/licenses/by/4.0/
dc.subject
pennate diatom frustule
en
dc.subject
micro-optics
en
dc.subject
near-field optics
en
dc.subject
photobiology
en
dc.subject
finite element method
en
dc.subject
diffraction-driven focusing
en
dc.subject
photonic jet
en
dc.subject
Talbot effect
en
dc.subject
guided-mode resonance
en
dc.subject.ddc
500 Naturwissenschaften und Mathematik::530 Physik::539 Moderne Physik
dc.title
Numerical analysis of the light modulation by the frustule of Gomphonema parvulum
dc.type
Wissenschaftlicher Artikel
dc.identifier.sepid
91238
dc.title.subtitle
the role of integrated optical components
dcterms.bibliographicCitation.articlenumber
113
dcterms.bibliographicCitation.doi
10.3390/nano13010113
dcterms.bibliographicCitation.journaltitle
Nanomaterials
dcterms.bibliographicCitation.number
1
dcterms.bibliographicCitation.originalpublishername
MDPI
dcterms.bibliographicCitation.originalpublisherplace
Basel
dcterms.bibliographicCitation.volume
13 (2023)
dcterms.bibliographicCitation.url
https://www.mdpi.com/2079-4991/13/1/113 $$z kostenfrei
refubium.affiliation
Physik
refubium.affiliation.other
Institut für Experimentalphysik
refubium.resourceType.isindependentpub
no
dcterms.accessRights.openaire
open access
dcterms.isPartOf.eissn
2079-4991