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THz wave emission from argon in two-color laser field |
| Du Ling-Ling (杜玲玲)a, Zhao Song-Feng (赵松峰)a, Zhou Xiao-Xin (周效信)a, Zhao Zeng-Xiu (赵增秀)b |
a College of Physics and Electronic Engineering, Northwest Normal University, Lanzhou 730070, China;
b Department of Physics, National University of Defense Technology, Changsha 410073, China |
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Abstract Terahertz (THz) wave emission from argon atom in a two-color laser pulses is studied numerically by solving the one-dimensional (1D) time-dependent Schrödinger equation. The THz spectra we obtained include both discontinuous and continuum ones. By using the special basis functions that we previously proposed, our analysis points out that the discontinuous and continuum parts are contributed by bound-bound and continuum-continuum transition of atomic energy levels. Although the atomic wave function is strongly dressed during the interaction with laser fields, our identification for the discontinuous part of the THz wave shows that the transition between highly excited bound states can still be well described by the field-free basis function in the tunneling ionization regime.
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Received: 20 August 2014
Revised: 30 November 2014
Accepted manuscript online:
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PACS:
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32.80.Rm
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(Multiphoton ionization and excitation to highly excited states)
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42.65.-k
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(Nonlinear optics)
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| Fund: Project supported by the National Natural Science Foundation of China (Grant Nos. 11465016, 11374366, and 11164025). |
Corresponding Authors:
Zhou Xiao-Xin, Zhao Zeng-Xiu
E-mail: zhouxx@nwnu.edu.cn;zhao.zengxiu@gmail.com
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Cite this article:
Du Ling-Ling (杜玲玲), Zhao Song-Feng (赵松峰), Zhou Xiao-Xin (周效信), Zhao Zeng-Xiu (赵增秀) THz wave emission from argon in two-color laser field 2015 Chin. Phys. B 24 043203
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