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使用近场光学显微术(scanning near-field optical microscopy,SNOM)研究了ZnO亚微米线端面出射性质,不同空间形貌Ⅱ-Ⅵ族半导体荧光器件光波导特性,二维光子晶体、准晶光子晶体对LED的出射增强作用以及表面等离激元(surface plasmon polariton,SPP)与半导体纳米荧光器件的相互作用,对纳米集成光路中的光源、光波导、光增强三个重要问题做了实验和理论上的分析.研究发现半导体微纳米线端面出射光束的质量与样品的直径有密切关系.通过合理地设计其直径和表面形貌,可以将其用于纳米集成光路中的光源和光波导.具有多种空间形貌的半导体原型荧光器件,如四脚锥结构、梳状结构、多分支结构都具有很好的光波导特性,能够实现分光、集光、耦合、滤波功能.二维光子晶体对GaN基LED的出光增强效果明显,最高可达5.2倍.近30%的荧光被局域在光子晶体表面没有传播出去.这一结论有利于进一步改善LED出光性能.将半导体光波导与SPP结合,在满足SPP共振激发条件时,可以增强二者界面处电磁场强度.光子晶体和SPP都可以实现低维、纳米尺度下的局域光放大,为纳米集成光路中的光增强提供了可能.
The near-field optical microscopy (SNOM) was used to investigate the emission properties of ZnO submicron wires, the optical properties of Ⅱ-Ⅵ semiconductor devices with different spatial morphology, two-dimensional photonic crystals, quasi- The effect of crystal on the emission of LED and the interaction between surface plasmon polariton (SPP) and semiconductor nanofluorescence device were studied. Three important problems of light source, optical waveguide and light enhancement in nano-integrated optical path Theoretical analysis shows that the quality of semiconductor micro-nanowire exit beam is closely related to the diameter of the sample, which can be used as a light source and an optical waveguide in a nano-integrated optical path by reasonably designing its diameter and surface morphology. Semiconductor prototype fluorescent devices with many spatial features, such as tetrapod structure, comb structure and multi-branch structure, have good optical waveguide characteristics and can realize the functions of splitting, collecting, coupling and filtering. GaN-based LED enhance the effect of light significantly, up to 5.2 times. Nearly 30% of the fluorescence was localized in the photonic crystal surface did not spread out. Which is conducive to further improve the LED light performance.When the semiconductor optical waveguide and the SPP are combined to meet the SPP resonance excitation conditions can enhance the electromagnetic field strength at the interface between the two.Photonic crystals and SPP can achieve low-dimensional, local light at the nanoscale Amplification provides the possibility of light enhancement in the nano-integrated optical path.