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

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Abstract

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.

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Authors and Affiliations

  1. Terahertz Sensing and Imaging Team, Center for Advanced Photonics, RIKEN, Sendai, 9800845, Japan

    Haiwei Du

  2. Key Laboratory for Laser Plasmas (Ministry of Education), Department of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai, 200240, China

    Nan Yang

Authors
  1. Haiwei Du
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  2. Nan Yang
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Correspondence to Haiwei Du.

Additional information

Haiwei Du was born in Henan, China, in 1980. He received the Master degree in Optics from Nankai University, China, in 2008, and the Ph.D. degree in Optics from Shanghai Jiao Tong University, China, in 2012.

He currently works with the Terahertz Sensing and Imaging Team, RIKEN, Japan, supported by the Foreign Postdoctoral Researcher Program of RIKEN. His current research interests include optical terahertz generation and detection, ultrafast nonlinear optics and laser plasma interaction.

Nan Yang was born in Henan, China, in 1981. She received the Master degree in Optics from Sichuan University, China, in 2008.

She is currently a Ph.D. student in the Department of Physics and Astronomy at Shanghai Jiao Tong University. Her current research interests include ultrahigh intensity and high power laser system technology, ultrafast optical and terahertz spectroscopy.

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Du, H., Yang, N. Optical ionization evolution effect on photocurrent produced from two-color femtosecond laser pulses. Front. Optoelectron. 8, 93–97 (2015). https://doi.org/10.1007/s12200-014-0450-2

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  • DOI: https://doi.org/10.1007/s12200-014-0450-2

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