动态化学腐蚀法制备大锥角近场光纤探针

基于液压传递原理,设计出一种用动态化学腐蚀法制备大锥角近场光纤探针的装置.实验结果表明,在传统的化学腐蚀法制备光纤探针的过程中,通过控制腐蚀液液面的上升速度,可以有效地控制探针针尖的形状以及锥角的大小.在此基础上,还论述了分步控制光纤与腐蚀液液面的相对位移的方法在大锥角光纤探针的制备中所具有的独特优越性.利用所制备的大锥角近场光纤探针在扫描近场光学显微镜上对直径为200nm的小球进行探测,其力学像证实该探针具有较高的形貌分辨率(约为50nm). 关键词： 动态化学腐蚀法 大锥角 近场光纤探针     

Properties of the incandescent light emitted fromdouble-walled carbon nanotube filament

We have studied the radiation of a double-walled carbon nanotube (DWNT) filament with a length of 4.5\,mm and a diameter of 10\,$\mu$m by applying an electric current through the filament. The DWNT filament starts emitting incandescent light at voltage $U=6$\,V. Emission spectra of the DWNT below temperature 1250\,K can well be fitted to those of the blackbody radiation. The intensity of the incandescent light shows an exponential dependence on the voltage applied on the DWNT filaments. The resistance of the DWNT filaments is very stable at high temperatures between 900 and 1250\,K during the emission of light in the experiments.     

CsCu2I3薄膜的制备及其吸收谱的研究

本文介绍了用热蒸发技术制备ＣｓＣｕ２Ｉ３薄膜的方法，根据ＣｓＣｕ２Ｉ３的低温吸收谱计算出其激子参数；谱分析表明，ＣｓＣｕ２Ｉ３的电子和激子激发定域在ＣｕＩ４＾２－组成的双链结构之中是导致其光谱复杂性的主要原因。