Abstract
We report experimental and theoretical verification of the nature and position of multiple interference points of visible light transmitted through the valve of the centric diatom species Coscinodiscus granii. Furthermore, by coupling the transmitted light into an optical fiber and moving the diatom valve between constructive and destructive interference points, an extinction ratio of 20 dB is shown.
Highlights
Diatoms are unicellular photosynthetic microorganisms and among the most common phytoplankton in all water environments and have a colossal impact on the primary production of the world contributing with around 25% of the total amount [1,2]
We report experimental and theoretical verification of the nature and position of multiple interference points of visible light transmitted through the valve of the centric diatom species Coscinodiscus granii
We are interested in developing a simple description of the multiple interference points described in simulations at a distance corresponding to outside the frustule when light interacts with the valve of the centric species Coscinodiscus granii (C. granii) [10, 12,13,14,15]
Summary
Diatoms are unicellular photosynthetic microorganisms and among the most common phytoplankton in all water environments and have a colossal impact on the primary production of the world contributing with around 25% of the total amount [1,2]. We are interested in developing a simple description of the multiple interference points described in simulations at a distance corresponding to outside the frustule when light interacts with the valve of the centric species Coscinodiscus granii (C. granii) [10, 12,13,14,15]. These interference points have been discussed on a theoretical basis and a few have been showed experimentally [13,14,15,16,17]. We show how the interference pattern of the valves can be used as the basis for an optical switch for coupling light into an optical fiber
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