Presentation
1 August 2021 Naturally sourced photonic and plasmonic crystals derived from diatom frustules
Author Affiliations +
Abstract
Diatoms are an abundant group of algae, sharing a unique feature; they produce silica exoskeletons featuring intricate nanostructures, known as a frustule. In certain species this includes a porous network with high precision lattices, strongly resembling photonic crystals produced using modern technological processes. Here we show two means for using these frustules as an optical material. Firstly, the unprocessed frustule can be used as a conventional photonic crystal. Secondly, a metal deposition processing step can yield plasmonic crystals. Both show high quality optical properties, analogous to lab-manufactured structures, and are produced over much larger areas at a much lower cost and without specialist equipment. Optical spectra (angularly resolved dispersions) are presented, along with simulation results to corroborate experimental findings and to allow optical mode characterisation and analysis.
Conference Presentation
© (2021) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
William P. Wardley, Johannes W. Goessling, and Martin Lopez Garcia "Naturally sourced photonic and plasmonic crystals derived from diatom frustules", Proc. SPIE 11797, Plasmonics: Design, Materials, Fabrication, Characterization, and Applications XIX, 1179715 (1 August 2021); https://doi.org/10.1117/12.2594516
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KEYWORDS
Photonic crystals

Plasmonics

Crystals

Metals

Nanostructures

Numerical modeling

Optical properties

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