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Optical properties of single diatom frustules revealed by confocal microspectroscopy

Abstract

Optical properties of single diatom frustule valves from two different Coscinodiscus species (C. wailesii and C. centralis) are studied by transmission confocal hyperspectral imaging and numerical calculations. Light convergence, concentration, and trapping effects are observed and depend on both the wavelength and the valve orientation. These effects seem to occur independently of the incident light angle. From our results, a wavelength-dependent multifocal lens behavior can be explained by light diffraction related to the radial symmetry of the multiscaled 3D nanostructure.

Category

Academic article

Client

  • Research Council of Norway (RCN) / 10358700

Language

English

Author(s)

Affiliation

  • Norwegian University of Science and Technology
  • University of Toulon
  • SINTEF Industry / Materials and Nanotechnology

Year

2015

Published in

Optics Letters

ISSN

0146-9592

Volume

40

Issue

5

Page(s)

740 - 743

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