Interference patterns and extinction ratio of the diatom Coscinodiscus granii

Maibohm, Christian; Friis, Søren; Ellegaard, Marianne; Rottwitt, Karsten

doi:10.1364/oe.23.009543

Cited by 16 publications

(16 citation statements)

References 19 publications

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“…We have observed differences in our measurements with regard to interference points, dependent on the way the valves are facing (unpublished data). This is in good agreement with findings by Romann et al (2015), where no interference points (see, e.g., Maibohm et al 2015a) are observed when the valve is facing with the outside towards the microscope in transmission experiments.…”

Section: Photonic Experimentssupporting

confidence: 92%

“…Later, the same approach, including the smaller holes, however, was used to predict that for visible light, multiple focus points are found as close as 100-200 μm from the plane of the valve, but that no such focusing is found for shorter wavelengths in the UV regime (De Tommasi et al 2010). While the latter prediction remains unconfirmed by experimental investigations, a recent study showed excellent agreement between experimental data and theory without the smaller holes in the visible regime (Maibohm et al 2015a), thus validating this numerical approach.…”

Section: Simulation Of Light Interaction With the Frustule Structurementioning

confidence: 96%

“…The ideas for potential applications for the silica frustule include photonic crystals (Fuhrmann et al 2004;Yamanaka et al 2008;de Stefano et al 2009), chemical sensors (de Stefano et al 2009), microlenses (de Stefano et al 2007a), enhanced light harvesting in solar cells (Ottesen 2011), light-focusing capabilities, and applications of this, such as optical switches (De Tommasi et al 2010;Maibohm et al 2015a;Ferrara et al 2014). Due to the destructive effects of UV radiation on living organisms and many types of materials, and due to the unwanted effects associated with many types of UV protection, there is great interest in finding novel means of UV protection without deleterious aspects.…”

Section: Potential Industrial Applications Of Diatom Frustulesmentioning

confidence: 99%

“…This includes photosynthetically active radiation (PAR) (400-700 nm), indicating that PAR light will be strongly influenced when it interacts with the frustule. This is seen when light in the PAR wavelength range is transmitted through the frustule; the pore structure interacts with the light and creates a wavelength-dependent interference pattern (De Tommasi et al 2010;Maibohm et al 2015a). The structure also interacts with the light in a way that it redirects light towards the cell interior even when light is striking the frustule at another angle than normal incidence (Maibohm et al 2015c).…”

Section: Structural Properties Of the Diatom Frustulementioning

confidence: 99%

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The fascinating diatom frustule—can it play a role for attenuation of UV radiation?

et al. 2016

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Diatoms are ubiquitous organisms in aquatic environments and are estimated to be responsible for 20-25 % of the total global primary production. A unique feature of diatoms is the silica wall, called the frustule. The frustule is characterized by species-specific intricate nanopatterning in the same size range as wavelengths of visible and ultraviolet (UV) light. This has prompted research into the possible role of the frustule in mediating light for the diatoms' photosynthesis as well as into possible photonic applications of the diatom frustule. One of the possible biological roles, as well as area of potential application, is UV protection. In this review, we explore the possible adaptive value of the silica frustule with focus on research on the effect of UV radiation on diatoms. We also explore the possible effect of the frustules on UV radiation, from a theoretical, biological, and applied perspective, including recent experimental data on UV transmission of diatom frustules.

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Section: Photonic Experimentssupporting

confidence: 92%

Section: Simulation Of Light Interaction With the Frustule Structurementioning

confidence: 96%

Section: Potential Industrial Applications Of Diatom Frustulesmentioning

confidence: 99%

Section: Structural Properties Of the Diatom Frustulementioning

confidence: 99%

See 2 more Smart Citations

The fascinating diatom frustule—can it play a role for attenuation of UV radiation?

et al. 2016

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“…In previous works [3,15,16], the proper extruding of a SEM image of the valve allowed the researchers to obtain only an approximate 3D model, useful just for rough simulations of light propagation. On the other hand, our method allows us to obtain a real, full 3D model, able to completely describe the non-uniform morphology of the valve.…”

Section: Resultsmentioning

confidence: 99%

Diatom Valve Three-Dimensional Representation: A New Imaging Method Based on Combined Microscopies

Ferrara

Tommasi

Coppola

et al. 2016

IJMS

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The frustule of diatoms, unicellular microalgae, shows very interesting photonic features, generally related to its complicated and quasi-periodic micro- and nano-structure. In order to simulate light propagation inside and through this natural structure, it is important to develop three-dimensional (3D) models for synthetic replica with high spatial resolution. In this paper, we present a new method that generates images of microscopic diatoms with high definition, by merging scanning electron microscopy and digital holography microscopy or atomic force microscopy data. Starting from two digital images, both acquired separately with standard characterization procedures, a high spatial resolution (Δz = λ/20, Δx = Δy ≅ 100 nm, at least) 3D model of the object has been generated. Then, the two sets of data have been processed by matrix formalism, using an original mathematical algorithm implemented on a commercially available software. The developed methodology could be also of broad interest in the design and fabrication of micro-opto-electro-mechanical systems.

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Frustule Photonics and Light Harvesting Strategies in Diatoms

Goessling

Kühl

et al. 2021

Diatom Morphogenesis

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Interference patterns and extinction ratio of the diatom Coscinodiscus granii

Cited by 16 publications

References 19 publications

The fascinating diatom frustule—can it play a role for attenuation of UV radiation?

The fascinating diatom frustule—can it play a role for attenuation of UV radiation?

Diatom Valve Three-Dimensional Representation: A New Imaging Method Based on Combined Microscopies

Frustule Photonics and Light Harvesting Strategies in Diatoms

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