bandedge states

Light exiting from real photonic band gap crystals is diffuse and strongly directional
A. F. Koenderink, and W. L. Vos
Phys. Rev. Lett. 91, 213902: 1-4 (2003)

Light transport through the bandedge states of Fibonacci quasicrystals
L. Dal Negro, C. J. Oton, Z. Gaburro, L. Pavesi, P. Johnson, A. Lagendijk, R. Righini, M. Colocci, and D. S. Wiersma
Phys. Rev. Lett. 90 (2003)