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7 March 2014Surface-plasmon-enhanced third-order harmonic generation of organic materials
We design and fabricate metallic photonic crystals that are integrated with highly-efficient third-order nonlinear polymers. Compared with nanoparticle-doped composite materials, metallic photonic crystals are favorable due to the presence of Bragg-grating-modulated surface plasmon polaritons (SPPs) with strong light localization in large spatial volumes to uniformly enhance the harmonic signals. We experimentally observed extraordinary emission of THG signals from the surface-plasmon-enhanced organic thin film using telecommunication wavelength pulsed laser. This hybrid organic-plasmonic nanostructure opens a new avenue to develop innovative nonlinear optical devices.