Switchable Bragg diffraction from liquid crystal in colloid-templated structures P. Mach, P. Wiltzius, M. Megens, D. A. Weitz, Keng-hui Lin, T. C. Lubensky and A. G. Yodh Europhys. Lett., 58 5 (2002) 679-685 Published online: 01 May 2002 DOI: 10.1209/epl/i2002-00403-3