Structure-based optical filtering by the silica microshell of the centric marine diatom Coscinodiscus wailesii

K. Kieu, C. Li, Y. Fang, G. Cohoon, O. D. Herrera, M. Hildebrand, K. H. Sandhage, R. A. Norwood

Research output: Contribution to journalArticle

26 Scopus citations

Abstract

Diatoms are a renewable (biologically reproducible) source of three-dimensional (3-D) nanostructured silica that could be attractive for a variety of photonic devices, owing to the wide range of quasi-periodic patterns of nano-to-microscale pores available on the silica microshells (frustules) of various diatom species. We have investigated the optical behavior of the silica frustule of a centric marine diatom, Coscinodiscus wailesii, using a coherent broadband (400-1700 nm) supercontinuum laser focused to a fine (20 μm diameter) spot. The C. wailesii frustule valve, which possessed a quasi-periodic hexagonal pore array, exhibited positiondependent optical diffraction. Changes in such diffraction behavior across the frustule were consistent with observed variations in the quasi-periodic pore pattern.

Original languageEnglish (US)
Pages (from-to)15992-15999
Number of pages8
JournalOptics Express
Volume22
Issue number13
DOIs
StatePublished - Jun 30 2014

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

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