中国物理B ›› 1998, Vol. 7 ›› Issue (8): 618-622.doi: 10.1088/1004-423X/7/8/010
• CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES • 上一篇 下一篇
赵岩, 冯钟潮, 梁勇
Zhao Yan (赵岩), Feng Zhong-chao (冯钟潮), Liang Yong (梁勇)
摘要: When laser pulses irradiate the surface of the sample WO3, an interesting coloration effect is obtained. Only by one pulse of XeCl laser irradiation (wavelength: 308 nm, pulse duration: 36 ns, output power: 100 mJ/pulse), a significant color change appears. X-ray photoelectron spectroscopy (XPS) shows that a partial reduction process of WO3 occurs and conduction band electrons appears. X-ray diffraction pattern indicates that the lattice parameters of the colored samples are increased. A molten layer can be seen in scanning electron microscopy (SEM) image. It may be concluded that the coloration effect of pulsed laser undergoes a process different from that of electro- or photo- chromism, and may be attributed to thermochromism and substoichiometric WO3 is formed. The coloration process is characterized by its high speed and stability.
中图分类号: (Ultraviolet, visible, and infrared radiation effects (including laser radiation))