期刊
APPLIED PHYSICS LETTERS
卷 109, 期 13, 页码 -出版社
AMER INST PHYSICS
DOI: 10.1063/1.4963883
关键词
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资金
- National Basic Research Program of China (973 Program) [2013CB922203]
- National Natural Science Fund of China [11374366, 11474359, 11574396, 11404400, 61490694]
Terahertz radiation from tunneling ionization of gaseous atoms and molecules in the two-color laser fields with various polarizations has been investigated. We experimentally demonstrate that the efficiency of terahertz emission in the circularly polarized laser fields with the same helicity is 5 times higher than that with linearly polarized two-color femtosecond pulses in high laser intensity. By solving time-dependent Schrodinger equation, this enhancement is well explained based on the analysis of electron tunneling ionization and subsequent dynamics. Published by AIP Publishing.
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