中国物理B ›› 2005, Vol. 14 ›› Issue (8): 1671-1675.doi: 10.1088/1009-1963/14/8/037

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

Interaction of femtosecond laser pulses with metal photocathode

刘运全, 张杰, 梁文锡   

  1. Key Laboratory of Optical Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100080, China
  • 收稿日期:2004-12-16 修回日期:2005-05-16 出版日期:2005-07-13 发布日期:2005-07-13
  • 基金资助:
    Project supported by the National Natural Foundation of China (Grant Nos 10374116, 60321003, 10390161) and BKBRSF (Grant No G1999075206).

Interaction of femtosecond laser pulses with metal photocathode

Liu Yun-Quan (刘运全), Zhang Jie (张杰), Liang Wen-Xi (梁文锡)   

  1. Key Laboratory of Optical Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100080, China
  • Received:2004-12-16 Revised:2005-05-16 Online:2005-07-13 Published:2005-07-13
  • Supported by:
    Project supported by the National Natural Foundation of China (Grant Nos 10374116, 60321003, 10390161) and BKBRSF (Grant No G1999075206).

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摘要： The features of interaction of femtosecond laser pulses with photocathode are studied theoretically in this paper. The surface temperature of the metal cathode film while femtosecond laser pulses irradiation is studied with two-temperature model. With a simple photoelectric model we obtain the optimum metal film thickness for the back-illuminated photocathode. The generated ultrashort photocurrent pulses are strongly dependent on the temperature of the electron gas and the lattice during the femtosecond laser pulse irradiation on the photocathode.

Abstract: The features of interaction of femtosecond laser pulses with photocathode are studied theoretically in this paper. The surface temperature of the metal cathode film while femtosecond laser pulses irradiation is studied with two-temperature model. With a simple photoelectric model we obtain the optimum metal film thickness for the back-illuminated photocathode. The generated ultrashort photocurrent pulses are strongly dependent on the temperature of the electron gas and the lattice during the femtosecond laser pulse irradiation on the photocathode.

Key words: femtosecond laser, photocathode, ultrashort electron pulse time resolved electron microscopy

中图分类号:  (Photomultipliers; phototubes and photocathodes)

  • 85.60.Ha
61.80.-x (Physical radiation effects, radiation damage) 61.82.Bg (Metals and alloys) 68.55.-a (Thin film structure and morphology) 63.20.K- (Phonon interactions)