Photonic Crystals: Mystery of Colours of Butterfly Wings

Photonic Crystals: Mystery of Colours of Butterfly Wings
Author(s):
Litty Irimpan
Keywords:
Colour, Butterfly, Photonic crystal, Photonic bandgap
Abstract
The delicate beauty of butterfly wings lies in their colour and it is due to its intricate structure and functionality. The butterfly wings are covered by scales built of chitin of refractive index 1.58. The typical dimensions of scales are in micrometer range. Each side of the wings of butterflies is covered by two distinct layers of scales. Thus they form layered periodic microstructures with contrast refractive index and act as photonic crystals. These quasi ordered multilayer structures may behave as photonic bandgap materials and produce different colours.
Article Details
Unique Paper ID: 153761 Publication Volume & Issue: Volume 8, Issue 8 Page(s): 437 - 438
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