外文题目: Characterization method of unusual second-order-harmonic generation based on vortex transformation
作者: Zhang, Chaojin; Wu, Erheng; Gu, Mingliang; Hu, Zhengfeng; Liu, Chengpu
刊名: Phys. Rev. A
年: 2017 卷: 96 期: 3 文章编号：33854
英文关键词:

HARMONIC-GENERATION; PULSES; PROPAGATION; MEDIA
英文摘要:
When a few-cycle laser beam nonresonantly propagates through an inversion-symmetric medium, beyond the usual odd-order harmonics in the transmission spectra, a well-defined spectral peak at twice the incident laser central frequency is disclosed [T. Tritschler et al., Phys. Rev. Lett. 90, 217404 (2003)]. Beyond the characterization method via the rf measurement of its carrier-envelope phase dependence, here a more direct mode of characterization is proposed by means of vortex transformation where a few-cycle vortex laser is adopted instead: One can easily clarify its origin as an usual third-order harmonic that appears to be a second-order harmonic, based on the criteria that the topological charge number of harmonics is directly proportional to its harmonic order.


文献类型: 期刊论文
正文语种: English
收录类别: SCI
DOI: 10.1103/PhysRevA.96.033854


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