中国物理B ›› 2009, Vol. 18 ›› Issue (8): 3517-3522.doi: 10.1088/1674-1056/18/8/063

• CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES • 上一篇    下一篇

Coherent field emission from a multi-walled carbon nanotube with two open-ended branches

柏鑫, 张耿民, 王鸣生, 张兆祥, 于洁, 赵兴钰, 郭等柱, 薛增泉   

  1. Key Laboratory for the Physics and Chemistry of Nanodevices and Department of Electronics, Peking University, Beijing 100871, China
  • 收稿日期:2008-10-16 修回日期:2008-11-25 出版日期:2009-08-20 发布日期:2009-08-20
  • 基金资助:
    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).

Coherent field emission from a multi-walled carbon nanotube with two open-ended branches

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)   

  1. Key Laboratory for the Physics and Chemistry of Nanodevices and Department of Electronics, Peking University, Beijing 100871, China
  • Received:2008-10-16 Revised:2008-11-25 Online:2009-08-20 Published:2009-08-20
  • Supported by:
    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).

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摘要： 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.

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.

Key words: interference, field emission, carbon nanotube

中图分类号:  (Nanotubes)

  • 73.63.Fg
68.37.Vj (Field emission and field-ion microscopy) 79.70.+q (Field emission, ionization, evaporation, and desorption)