Three-dimensional periodic structures of elastic polymers for full color tunable laser applications

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This research project aims at the fabrication of 3D ordered structure of polymer microparticles, that is, colloidal crystals (CCs), leading to tunable laser action on the basis of the photonic band effect of CCs. Such CC films were prepared by shearing an aqueous suspension of polymer microparticles with polymer gel precursors between glass substrates. Subsequently, the CC films could be stabilized by a polymer gel through photopolymerization. In this project, I have successfully demonstrated the tunable laser action from the CC gel film stabilized by an ionic liquid in a wide wavelength range by mechanical stress.