| ATOMIC AND MOLECULAR PHYSICS |
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Carrier Envelope Phase Description for an Isolated Attosecond Pulse by Momentum Vortices |
| Meng Li1,2, Gui-zhong Zhang1**, Xin Ding1, Jian-quan Yao1 |
1College of Precision Instrument and Optoelectronics Engineering, Tianjin University, Tianjin 300072
2Civil Aviation Meteorological Institute, Key Laboratory of Operation Programming & Safety Technology of Air Traffic Management, Civil Aviation University of China, Tianjin 300300
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| Cite this article: |
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Meng Li, Gui-zhong Zhang, Xin Ding et al 2019 Chin. Phys. Lett. 36 063201 |
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Abstract As a crucial parameter for a few-cycle laser pulse, the carrier envelope phase (CEP) substantially determines the laser waveform. We propose a method to directly describe the CEP of an isolated attosecond pulse (IAP) by the vortex-shaped momentum pattern, which is generated from the tunneling ionization of a hydrogen atom by a pair of time-delayed, oppositely and circularly polarized IAP-IR pulses. Superior to the angular streaking method that characterizes the CEP in terms of only one streak, our method describes the CEP of an IAP by the features of multiple streaks in the vortex pattern. The proposed method may open the possibility of capturing sub-cycle extreme ultraviolet dynamics.
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Received: 08 March 2019
Published: 18 May 2019
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| Fund: Supported by the National Natural Science Foundation of China under Grant Nos 11674243 and 11674242 |
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