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利用扫描近场光学显微系统,研究了CdS及CdSxSe1-x一维纳米结构的荧光传输特性.实验表明光致荧光可以在直的或者弯曲的一维纳米结构中传输,并实现在纳米结构的端部出射.根据在不同激发光强度下的CdS纳米带端部的三维扫描近场光学像,分析了随着激发光强度增加,纳米带可能出现的受激发射现象.通过近场扫描成像,分析了CdSxSe1-x一维纳米结构光致荧光在结构端部的光出射现象.对于不同组分的CdSxSe1-x一维纳米结构分别测其原位以及传导一定距离之后的光致荧光谱,观测到红移现象.分析表明,红移是由于荧光在纳米结构的传输中的吸收效应造成的.对于CdS及CdSxSe1-x一维纳米结构的光学传输的研究,有助于发展新型功能的纳米器件.
The fluorescence transmission properties of CdS and CdSxSe1-x one-dimensional nanostructures were investigated by using scanning near-field optical microscopy. Experiments show that photofluorescence can be transmitted in straight or curved one-dimensional nanostructures and in nanostructured End emission.According to the three-dimensional scanning near-field optical images of the end of CdS nanoribbons under different excitation light intensities, the possible stimulated emission phenomenon of the nanoribbons is analyzed with the increase of the excitation light intensity.Through near-field scanning imaging, The light exiting phenomenon of CdSxSe1-x one-dimensional nanostructured photoluminescence at the end of the structure was analyzed. For the CdSxSe1-x one-dimensional nanostructures with different compositions, the photoluminescence spectra of CdSxSe1- To redshift phenomenon.The analysis shows that the redshift is caused by the absorption effect of fluorescence in the nanostructures.The research on the optical transmission of CdS and CdSxSe1-x one-dimensional nanostructures contributes to the development of novel functional nanostructures .