Lin H Y, Cheng C L, Chou Y Y, Huang L L, Chen Y F, Tsen K T
Opt Express. 2006 Mar 20;14(6):2372-9. doi: 10.1364/oe.14.002372.
Defect radiation has been always considered as the most important loss for an emitter based on band gap emission. Here, we propose a novel approach which goes against this conventional wisdom. Based on the resonance effect between the surface plasmon of metal nanoparticles and defect emission, it is possible to convert the useless defect radiation to the useful excitonic emission with a giant enhancement factor. Through the transfer of the energetic electrons excited by surface plasmon from metal nanoparticles to the conduction band of the emitter, the band gap emission can be greatly enhanced, while the defect emission can be suppressed to noise level.
对于基于带隙发射的发光体而言，缺陷辐射一直被视为最重要的损耗。在此，我们提出了一种与这种传统观念相悖的新方法。基于金属纳米颗粒的表面等离子体与缺陷发射之间的共振效应，可以将无用的缺陷辐射转换为具有巨大增强因子的有用激子发射。通过表面等离子体激发的高能电子从金属纳米颗粒转移到发光体的导带，带隙发射可以得到极大增强，而缺陷发射可以被抑制到噪声水平。
