Pump-probe scanning near field optical microscopy: Sub-wavelength resolution chemical imaging and ultrafast local dynamics
Pump-probe scanning near field optical microscopy: Sub-wavelength resolution chemical imaging and ultrafast local dynamics
复制标题
DOI：
10.1063/1.3701724
复制
发表时间：
2012-04-09
影响因子：
4
通讯作者：
Materny, Arnulf
中科院分区：
文献类型：
--
作者：
Karki, Khadga;Namboodiri, Mahesh;Materny, Arnulf
利用扫描近场光学显微镜对有机半导体3，4，9，10二萘嵌苯四甲酸二酐薄膜进行了双色飞秒时间分辨泵浦-探测实验。利用这种技术，可以通过将速率模型拟合到瞬态吸收光谱来获得具有高时间和空间分辨率的激子动力学的定量信息。此外，该技术固有的化学选择性增强了对比度，当使用高重复率激光器时，其可用于视频速率成像。(C)2012年美国物理学会。[http：//dx.doi.org/10.1063/1.3701724]
Results of two color femtosecond time-resolved pump-probe experiments using scanning near field optical microscopy on thin films of organic semiconductor 3,4,9,10 perylenetetracarboxylic dianhydride are presented. With this technique, quantitative information on exciton dynamics with high temporal and spatial resolution can be obtained by fitting a rate model to the transient absorption spectra. Additionally, the chemical selectivity inherent to this technique enhances the contrast, which could be used for video-rate imaging when high-repetition rate lasers are used. (C) 2012 American Institute of Physics. [http://dx.doi.org/10.1063/1.3701724]