Interpretation of small-angle diffraction experiments on opal-like photonic crystals

F. Marlow,1,2,* M. Muldarisnur,1 P. Sharifi,1 and H. Zabel3 1Max-Planck-Institut fur Kohlenforschung, Kaiser-Wilhelm-Platz 1, DE-45470 Mulheim an der Ruhr, Germany 2Center for Nanointegration Duisburg-Essen (CeNIDE), University of Duisburg-Essen, Germany 3 Department of Experimental Physics, Ruhr University Bochum, DE-44780 Bochum, Germany (Received 1 June 2011; revised manuscript received 30 June 2011; published 1 August 2011)