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Attosecond Delays of High-Harmonic Emissions from Hydrogen Isotopes Measured by XUV Interferometer
- Ultrafast Science Vol. 2, Issue 5, (2022)
- Affiliations：
a Centre for Quantum Dynamics, Griffith University, Brisbane, Queensland 4111, Australiab Key Laboratory for Laser Plasmas (Ministry of Education) and School of Physics and Astronomy, Collaborative Innovation Center for IFSA (CICIFSA), Shanghai Jiao Tong University, Shanghai 200240, Chinac Shanghai Key Lab of Modern Optical System, University of Shanghai for Science and Technology, 200093 Shanghai, Chinad CAS Center for Excellence in Ultra-Intense Laser Science,Shanghai,China,201800
- Author bio：
- Funds：The experimental research was supported by the Australian Research Council (LP140100813 and DP190101145) and Griffith University. M. M. was supported by a Griffith University International Postgraduate Research Scholarship (GUIPRS) and a Griffith University Postgraduate Research Scholarship (GUPRS). Theoretical work was supported by the National Key R&D Program of China (Nos. 2018YFA0404802 and2018YFA0306303), Innovation Program of Shanghai Municipal Education Commission (2017-01-07-00-02-E00034), National Natural Science Foundation of China (NSFC) (Grant Nos. 11574205, 91850203, and 12204308), and Shanghai Science and Technology Commission (GrantsNo. 22ZR1444100).
DOI：10.34133/2022/9834102
CLC：Published：2022，
- Accepted：
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Mumta Hena Mustary, Liang Xu, Wanyang Wu, Nida Haram, Dane E. Laban, Han Xu, Feng He, R. T. Sang, Igor V. Litvinyuk. 2022: Attosecond Delays of High-Harmonic Emissions from Hydrogen Isotopes Measured by XUV Interferometer. 超快科学, 2022(5).
Mumta Hena Mustary , Liang Xu , Wanyang Wu, Nida Haram, 1 Dane E. Laban, Han Xu, Feng He, R. T. Sang , Igor V. Litvinyuk. 2022: Attosecond Delays of High-Harmonic Emissions from Hydrogen Isotopes Measured by XUV Interferometer. Ultrafast Science, 2022(5).
Mumta Hena Mustary, Liang Xu, Wanyang Wu, Nida Haram, Dane E. Laban, Han Xu, Feng He, R. T. Sang, Igor V. Litvinyuk. 2022: Attosecond Delays of High-Harmonic Emissions from Hydrogen Isotopes Measured by XUV Interferometer. 超快科学, 2022(5). DOI： 10.34133/2022/9834102
Mumta Hena Mustary , Liang Xu , Wanyang Wu, Nida Haram, 1 Dane E. Laban, Han Xu, Feng He, R. T. Sang , Igor V. Litvinyuk. 2022: Attosecond Delays of High-Harmonic Emissions from Hydrogen Isotopes Measured by XUV Interferometer. Ultrafast Science, 2022(5). DOI： 10.34133/2022/9834102
摘要
High-harmonic spectroscopy can access structural and dynamical information on molecular systems encoded in the amplitude and phase of high-harmonic generation (HHG) signals. However
measurement of the harmonic phase is a daunting task.Here
we present a precise measurement of HHG phase difference between two isotopes of molecular hydrogen using the advanced extreme-ultraviolet (XUV) Gouy phase interferometer. The measured phase difference is about 200 mrad
corresponding to ~3 attoseconds (1 as = 10−18 s) time delay which is nearly independent of harmonic order. The measurements agree very well with numerical calculations of a four-dimensional time-dependent Schödinger equation. Numerical simulations also reveal the effects of molecular orientation and intramolecular two-center interference on the measured phase difference.This technique opens a new avenue for measuring the phase of harmonic emission for different atoms and molecules. Together with isomeric or isotopic comparisons
it also enables the observation of subtle effects of molecular structures and nuclear motion on electron dynamics in strong laser fields.
Abstract
High-harmonic spectroscopy can access structural and dynamical information on molecular systems encoded in the amplitude and phase of high-harmonic generation (HHG) signals. However
measurement of the harmonic phase is a daunting task.Here
we present a precise measurement of HHG phase difference between two isotopes of molecular hydrogen using the advanced extreme-ultraviolet (XUV) Gouy phase interferometer. The measured phase difference is about 200 mrad
corresponding to ~3 attoseconds (1 as = 10−18 s) time delay which is nearly independent of harmonic order. The measurements agree very well with numerical calculations of a four-dimensional time-dependent Schödinger equation. Numerical simulations also reveal the effects of molecular orientation and intramolecular two-center interference on the measured phase difference.This technique opens a new avenue for measuring the phase of harmonic emission for different atoms and molecules. Together with isomeric or isotopic comparisons
it also enables the observation of subtle effects of molecular structures and nuclear motion on electron dynamics in strong laser fields.
关键词
High Harmonic Generation XUV interferometer Attosecond Delay Gouy Phase
Keywords
High Harmonic Generation XUV interferometer Attosecond Delay Gouy Phase
references
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