Energy transfer boosted by photonic crystals with metal film patterns.

An active plasmonic device is fabricated by introducing a photonic crystal structure into an energy transfer system across a metal film. It is demonstrated that the stopband of the photonic crystal plays a key role in improving the efficiency of the energy transfer. A well-designed stopband can enhance the emission intensity of the device by over ten times compared with that of a similar planar device. Active plasmonic devices based on photonic crystal structure will provide promising materials for highly efficient optic devices. [ABSTRACT FROM AUTHOR]