Optical spectroscopy of high dielectric contrast 3D photonic crystals P. V. Braun, R. W. Zehner, C. A. White, M. K. Weldon, C. Kloc, S. S. Patel and P. Wiltzius Europhys. Lett., 56 2 (2001) 207-213 Published online: 01 December 2003 DOI: 10.1209/epl/i2001-00507-2