Calcitic Prisms of The Giant Seashell Pinna Nobilis Form Light Guide Arrays - Sorbonne Université Access content directly
Journal Articles Advanced Materials Year : 2023

Calcitic Prisms of The Giant Seashell Pinna Nobilis Form Light Guide Arrays

Shahrouz Amini
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  • PersonId : 1298452
Tingting Zhu
  • Function : Author
Abin Biswas
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Mohammad Avalin Charsooghi
  • Function : Author
Kyoohyun Kim
  • Function : Author
Simone Reber
  • Function : Author
Peter Fratzl
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  • PersonId : 899629

Abstract

The shells of the Pinnidae family are based on a double layer of single‐crystal‐like calcitic prisms and inner aragonitic nacre, a structure known for its outstanding mechanical performance. However, on the posterior side, shells are missing the nacreous layer, which raises the question of whether there can be any functional role in giving up this mechanical performance. Here, it is demonstrated that the prismatic part of the Pinna nobilis shell exhibits unusual optical properties, whereby each prism acts as an individual optical fiber guiding the ambient light to the inner shell cavity by total internal reflection. This pixelated light channeling enhances both spatial resolution and contrast while reducing angular blurring, an apt combination for acute tracking of a moving object. These findings offer insights into the evolutionary aspects of light‐sensing and imaging and demonstrate how an architectured optical system for efficient light‐tracking can be based on birefringent ceramics.
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Dates and versions

hal-04254841 , version 1 (23-10-2023)

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Shahrouz Amini, Tingting Zhu, Abin Biswas, Mohammad Avalin Charsooghi, Kyoohyun Kim, et al.. Calcitic Prisms of The Giant Seashell Pinna Nobilis Form Light Guide Arrays. Advanced Materials, 2023, 35 (39), ⟨10.1002/adma.202304166⟩. ⟨hal-04254841⟩
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