Search for an optimal light-extracting surface derived from the   morphology of a firefly lantern
  Fireflies lighten up our warm summer evenings. There is more physic behind these little animals than anyone of us could imagine. In this paper we analyze from a physical point of view one structure found on the firefly lantern, the one which best improves light extraction. Moreover, simulations will be done to show why this specific structure may be more effective than a "human-thought" one. 
Annick Bay, Michael Sarrazin, Jean Pol Vigneron
physics.optics physics.bio-ph