Optical structure and function of the white filamentary hair covering the edelweiss bracts.

  title={Optical structure and function of the white filamentary hair covering the edelweiss bracts.},
  author={Jean-Pol Vigneron and Marie Rassart and Zofia V{\'e}rtesy and Kriszti{\'a}n Kert{\'e}sz and Michael Sarrazin and L{\'a}szl{\'o} P{\'e}ter Bir{\'o} and Damien Ertz and Virginie Lousse},
  journal={Physical review. E, Statistical, nonlinear, and soft matter physics},
  volume={71 1 Pt 1},
The optical properties of the inflorescence of the high-altitude Leontopodium nivale subsp. alpinum (edelweiss) is investigated, in relation with its submicrometer structure, as determined by scanning electron microscopy. The filaments forming the hair layer have been found to exhibit an internal structure which may be one of the few examples of a photonic structure found in a plant. Measurements of light transmission through a self-supported layer of hair pads taken from the bracts supports… 

White hairy layer on the Boehmeria nivea leaf—inspiration for reflective coatings

Boehmeria nivea, a widely distributed tropical and subtropical plant, has a highly reflective layer on the lower surface of the leaf that is shown to exhibit a protection function by reflecting incident light when exposed to high radiation.

Complex optical structure in the ribbon-like feathers of the African open-bill stork

The structural origin of the weak iridescence from the very peculiar ribbon-shaped feathers of the African open-bill stork, Anastomus lamelligerus (Ciconiidae) is investigated, using a combination of

Natural layer-by-layer photonic structure in the scales of Hoplia coerulea (Coleoptera)

The shift of the reflected wavelength to the ultraviolet (passing through violet iridescence) is described and explained on the basis of the optical properties of this structured metamaterial.

Unique Reflection Property Due to Bumpy Multilayer Structure in Elytra of Rhomborrhina unicolor

This study analyzed the glossy green structural color of Rhomborrhina unicolor using scanning transmission electron microscopy and reflection spectroscopy and found that the green light is reflected over a broad range of angles to the elytron surface, which may be helpful in camouflage, conspecific recognition, and so forth.

Natural layer-by-layer photonic structure in the squamae of Hoplia coerulea (Coleoptera).

The microscopic structure of the hard external parts of the body of the iridescent blue-violet chaffer beetle Hoplia coerulea is studied using scanning electron microscopy. The blue iridescence is

Disordered wax platelets on Tradescantia pallida leaves create golden shine.

It is found that, contrary to the commonly found UV reflectance, the epicuticular wax crystals on Tradescantia leaves reflect strongly in the higher visible wavelength regime, which gives the leaves a golden shine.

Discovery of ordered and quasi-ordered photonic crystal structures in the scales of the beetle Eupholus magnificus.

The outer wing casings of the weevil Eupholus magnificus are marked by yellow and blue bands and it is demonstrated that the scales in the yellow elytral bands comprise highly ordered 3D photonic crystal structures, whereas the scales of the blue bands comprise quasi-ordered 3DPhotonic structures.

Optical function of the finite-thickness corrugated pellicle of euglenoids.

Results confirm that the corrugated pellicle of euglenoids shields the cell from harmful UV radiation and open up new possibilities for the design of highly UV-reflective surfaces.



Ultrastructural basis and function of iridescent blue colour of fruits inElaeocarpus

It is shown that the colour of iridescent fruit colour is caused by a remarkable structure in the epidermis, and evidence for its selective advantage is provided.

Structural colour: Opal analogue discovered in a weevil

A beetle, Pachyrhynchus argus, found in forests in northeastern Queensland, Australia, is described that has a metallic coloration that is visible from any direction owing to a photonic crystal structure analogous to that of opal.

Coloration strategies in peacock feathers

  • J. ZiXindi Yu Rongtang Fu
  • Physics
    Proceedings of the National Academy of Sciences of the United States of America
  • 2003
Simulations reveal that the photonic-crystal structure possesses a partial photonic bandgap along the direction normal to the cortex surface, for frequencies within which light is strongly reflected.

Role of photonic-crystal-type structures in the thermal regulation of a Lycaenid butterfly sister species pair.

The optical and electron microscopic investigation of two male butterflies-blue and brown-representing a sister species pair and originating from different altitudes, revealed that the blue color can be attributed unambiguously to the fine, spongelike medium, called "pepper-pot structure," present between the ridges and the cross ribs in the scales of the colored butterfly.

Epidermal cells functioning as lenses in leaves of tropical rain-forest shade plants.

A ray tracing model has been developed to investigate the possible focusing effects of the convexly curved epidermal cell walls which characterize a number of shade-adapted plants. The model

Photonic structures in biology

An astonishing variety of natural photonic structures exists: a species of Brittlestar uses photonic elements composed of calcite to collect light, Morpho butterflies use multiple layers of cuticle and air to produce their striking blue colour and some insects use arrays of elements to reduce reflectivity in their compound eyes.

Molding the flow of light

How computer calculations and design play particularly important and complementary roles in experimental investigations of photonic crystals is considered, including results for never before possible photon phenomena.

Use of Fano resonances for bistable optical transfer through photonic crystal films

Bistable or multistable transmissions are classically the result of the introduction of nonlinear layers into a resonant Fabry-Perot cavity. A single inhomogeneous film, with a periodic lateral