Unveiling spatial correlations in biophotonic architecture of   transparent insect wings
  We probe the natural complex structures in the transparent insect wings by a simple, non-invasive, real time optical technique using both monochromatic and broadband femtosecond lasers. A stable, reproducible and novel diffraction pattern is observed unveiling long range spatial correlations and structural-symmetry at various length scales for a large variety of wings. While matching the sensitivity of SEM for such microstructures, it is highly efficient for extracting long range structural organization with potentially broad applicability. 
Pramod Kumar, Danish Shamoon, Dhirendra P. Singh, Sudip Mandal and   Kamal P. Singh
physics.optics