Abstract Interference fringes are obtained in a field-emission microscopy (FEM) study of a multi-walled carbon nanotube (MWCNT) with two open-ended branches. The FEM pattern, which is composed of three parallel streaks, can be interpreted by using classical Young's double-slit interference with the ends of the two MWCNT branches treated as two secondary sources of the electron wave. The origin of the coherency of the electron beams from the two branches is discussed on the basis of the quantitative analysis of the FEM pattern. The result suggests a new approach to obtaining a coherent electron source.
Received: 16 October 2008
Revised: 25 November 2008
Accepted manuscript online:
(Field emission, ionization, evaporation, and desorption)
Fund: Project supported by the National
Natural Science Foundation of China (Grant No 60771004) and the
Ministry of Science and Technology of the People's Republic of China
(Grant No 2006CB932402).
Cite this article:
Bai Xin(柏鑫), Zhang Geng-Min(张耿民), Wang Ming-Sheng(王鸣生), Zhang Zhao-Xiang(张兆祥), Yu Jie(于洁), Zhao Xing-Yu(赵兴钰), Guo Deng-Zhu(郭等柱), and Xue Zeng-Quan(薛增泉) Coherent field emission from a multi-walled carbon nanotube with two open-ended branches 2009 Chin. Phys. B 18 3517
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