On the possibility of controlling the optical properties of opal-based, three-dimensional ``soft'' photonic crystals Romanov, S. G. ; Fokin, A. V. ; Butko, V. Yu. ; Tret'yakov, V. V. ; Samoilovich, S. M. ; Sotomayor-Torres, C. M. Abstract Publication: Physics of the Solid State Pub Date: November 1996 Bibcode: 1996PhSS...38.1825R