Optical ionization evolution effect on photocurrent produced from two-color femtosecond laser pulses

• Published in: Frontiers of Optoelectronics (Online) Vol. 8; no. 1; pp. 93 - 97
• Main Authors: DU, Haiwei, YANG, Nan
• Format: Journal Article
• Language: English
• Published: Heidelberg Higher Education Press 01.03.2015
• Subjects: Biomedical Engineering and Bioengineering; Electrical Engineering; Engineering; multiphoton ionization (MPI); photocurrent; Physics; Research Article; tunneling ionization (TI); 光电流; 光离子化; 光脉冲产生; 双色; 空气等离子体; 进化; 隧道电离; 飞秒激光脉冲; tunneling ionization (TI); photocurrent; multiphoton ionization (MPI)
• ISSN: 2095-2759; 2095-2767
• DOI: 10.1007/s12200-014-0450-2

When laser intensity varies, the ionization induced by optical field can be described by multiphoton ionization (MPI) in low regime and tunneling ionization (TI) in high regime. An empirical formula was used to fit the ionization happened between these two limitation ionization processes. Based on this, ionization rate and photocurrent induced by two-color femtosecond laser pulses interaction with air-plasma were investigated numerically. It was found that they have different relations with the laser intensity.