Interaction of femtosecond laser pulses with metal photocathode

• 来源期刊: 中国物理（英文版）
• 关键词: femtosecond laser photocathode ultrashort electron pulse time resolved electron microscopy
• 年，卷（期）: 2005,（8）
• 页码范围: 1671-1675
• 页数: 5页
• 语种: 英文

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 twotemperature model. With a simple photoelectric model we obtain the optimum metal film thickness for the backilluminated 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.