| 초록 |
During the last decade, photonic crystals which are arrays of dielectric materials with one-, two-, or three-dimensional periodicity have attracted much attention from many researchers. These photonic crystals may be useful for lots of applications in photonic and optoelectronic device area. Self-assembled opal and inverse opal structures by using colloidal particles have been attempted for one of the promising photonic band gap materials. We investigated azo-based polymer photonic crystal structures with self-organized silica colloidal particles. When azobenzene-functionalized organic materials were exposed to the light, azobenzene chromophores performed photoisomerization and orientational redistribution. It could also result optical fabrication of surface relief grating (SRG) on azo-based polymer film. In this presentation, epoxy-based azobenzene-functionalized polymer was infiltrated and polymerized in the self-assembled silica colloidal crystal. Azo-polymer inverse opal structures which were fabricated by removing the artificial silica opal had optical stop band in the specific wavelength region. When these polymer inverted opals were exposed to light, optical properties could be tuned. Detailed characteristics of azo-polymer photonic crystal structures will be discussed. |
